How many professional relationships can one person maintain?

Fewer than most people think. The research on stable social groups puts the limit around 150 for people you know well, and far fewer for people you could ask a favour of this week. A working professional network is usually a few dozen relationships you actively keep, a couple of hundred you could revive with one email, and a long tail of names with no memory attached. The mistake is trying to maintain all three tiers the same way.

How often should I reach out to people in my network?

Less often than a cadence would tell you, and with more reason. A quarterly check-in with nothing to say is worse than silence, because it reads as a check-in. The better trigger is a reason: something they would want to know, someone they should meet, a change in their situation you noticed. If you have a real reason every four months, that is a healthy relationship. If you have none for a year, ask whether it is one you are keeping.

What is the best way to reconnect with someone after a long time?

Name the gap, give a reason, make it easy to ignore. "It has been a while. I saw the news about the raise and thought of the conversation we had about pricing. No need to reply, just glad it worked out." The reason does the work; it shows you were paying attention rather than running down a list. Do not apologise at length and do not ask for anything in the first message.

How do I keep track of my network without a spreadsheet?

Let your email and calendar be the record, and use a tool that reads them. Every conversation you have already leaves a trace: who, when, how often, whether they reply. A spreadsheet asks you to copy that by hand and you will stop within a month. A tool that reads the inbox keeps the last-contact date true on its own, which is the one thing a spreadsheet cannot do and the one thing this whole problem turns on.

Managing your network

How to manage your professional network without it becoming a job

Keeping a few hundred relationships alive is a system problem. Which ones to keep, how to notice when one is fading, and what to do about it.

August 29, 2026

Managing a professional network means deciding which relationships you are actually keeping, noticing when one of them is going quiet before it goes cold, and reaching out with a reason rather than a check-in. Past a couple of hundred people none of that fits in your head, so the practical version is a system that reads your email and calendar, tells you who you have real history with that you have not spoken to in a while, and makes the reconnect cheap. The rest is deciding whom to let go.

The problem is not effort, it is memory

Most advice on managing your network tells you to be more disciplined. Set reminders. Block time on Fridays. Reach out to five people a week. It assumes the reason you lost touch with someone was that you did not try hard enough.

That is rarely the reason. The reason is that you did not know. You did not know it had been fourteen months. You did not know she had changed jobs. You did not know the founder you introduced three people to last year had not heard from you since. Human memory is good at faces and bad at dates, and past a couple of hundred people it simply stops answering the question "who have I not spoken to in a while".

So the useful version of managing a network is mostly a system for knowing, and only a little bit a system for doing. Once you can see who is going quiet, the reaching out is the easy part.

Decide which relationships you are keeping

A network is not everyone you have ever met. It has tiers, and treating them the same is how people burn out on this.

There are the few dozen people you actively keep: the ones whose calls you take, whom you would introduce to anyone, whose news you want. There are the couple of hundred you could revive with one good email, because the history is real even if the recent contact is not. And there is the long tail of names with no memory attached, from conferences and cold inbound and jobs three companies ago.

The first tier gets your attention. The second tier gets a system. The third tier gets let go, and letting go is not rude; it is honest. Most of the guilt people carry about their network is guilt about the third tier, and it is misplaced.

The hard part is that the tiers move. Someone in the second tier becomes first-tier the day they start a company in your space. Someone in the first tier drifts to the second when they leave the industry. A good system notices the drift.

Notice who is going quiet before they go cold

This is the whole game, and it is the part no reminder app gets right.

A reminder is a cadence you set: talk to this person every ninety days. It fires whether or not anything has changed, and it fires for people you have already spoken to twice this month because you forgot to log it. Within a few weeks you are dismissing reminders the way you dismiss calendar alerts, and the tool has become noise.

The better signal is behaviour. You have real history with this person, meetings, long email threads that went both ways, and then nothing, on every channel, for longer than your usual rhythm with them. That pattern is a relationship going quiet, and it is detectable from your email and calendar without you logging anything, because every conversation already left a trace.

The difference matters. A cadence tells you who is due. Behaviour tells you who is fading. Those are different lists, and the second one is the one worth acting on.

Reach out with a reason, not a check-in

Once you know who is going quiet, the message is the easy part, as long as it has a reason.

"Just checking in" is the worst message in professional life. It asks the other person to do the work of finding something to say, and it signals that you are running down a list. The messages that land carry a reason: something you saw that they would want to know, someone you think they should meet, a question only they can answer, a specific memory of the last conversation.

The reason does not have to be big. "Saw the news about the raise and thought of what you said about pricing" is enough. It proves you were paying attention, which is the thing a check-in fails to prove.

If you cannot find a reason for someone, that is information too. It might mean the relationship has quietly moved to a tier you do not keep. That is allowed.

Make the reconnect cheap

An advisor or investor with two hundred second-tier relationships will have a dozen going quiet at any moment. If each reconnect costs fifteen minutes of remembering the history and drafting a message, most of them will not happen. If it costs two minutes, they will.

That is where tooling earns its place. Not in reminding you, but in putting the history in front of you, when you last spoke, what about, what has changed since, and drafting a first version of the message in your voice that you edit rather than write. The best systems also follow up once if there is no reply, and stop the moment the person responds, so you never send a second nudge into a conversation that has already restarted.

NetworkOS does exactly this piece. It reads Gmail, Calendar and LinkedIn, finds the people you have real history with who have gone quiet on every channel, tells you why in one line, and drafts a short reconnect sequence you review and send from your own Gmail. The follow-ups stop the instant anything happens between you. It has no Outlook support today, so if your mail lives there it is not an option yet. Dex and Relatable take the cadence approach instead, which suits people who want to set the rhythm themselves.

A system that fits in an hour a week

Put together, the system is small.

Once, decide the tiers. Write down the few dozen you actively keep. Everyone else is either revivable or let go, and you do not need to list them.

Let your email and calendar be the record. Do not maintain a spreadsheet of last-contact dates; it will be wrong within a month. Use something that reads the inbox.

Once a week, look at who is going quiet, in the behaviour sense. Pick the three where you can find a real reason to write. Write those three. Ignore the rest without guilt.

When you meet someone new, decide in the moment which tier they are in. Most are third tier, and that is fine.

The short version

Managing a professional network is a knowing problem before it is a doing problem. Decide which few dozen relationships you actively keep and let the long tail go. Let your email and calendar be the record instead of a spreadsheet. Watch for relationships going quiet in the behavioural sense, real history followed by silence, rather than relying on a cadence. Reach out with a reason, never a check-in, and make the reconnect cheap enough that you actually do it. An hour a week covers it.

Common questions

How many professional relationships can one person maintain?: Fewer than most people think. The research on stable social groups puts the limit around 150 for people you know well, and far fewer for people you could ask a favour of this week. A working professional network is usually a few dozen relationships you actively keep, a couple of hundred you could revive with one email, and a long tail of names with no memory attached. The mistake is trying to maintain all three tiers the same way.
How often should I reach out to people in my network?: Less often than a cadence would tell you, and with more reason. A quarterly check-in with nothing to say is worse than silence, because it reads as a check-in. The better trigger is a reason: something they would want to know, someone they should meet, a change in their situation you noticed. If you have a real reason every four months, that is a healthy relationship. If you have none for a year, ask whether it is one you are keeping.
What is the best way to reconnect with someone after a long time?: Name the gap, give a reason, make it easy to ignore. "It has been a while. I saw the news about the raise and thought of the conversation we had about pricing. No need to reply, just glad it worked out." The reason does the work; it shows you were paying attention rather than running down a list. Do not apologise at length and do not ask for anything in the first message.
How do I keep track of my network without a spreadsheet?: Let your email and calendar be the record, and use a tool that reads them. Every conversation you have already leaves a trace: who, when, how often, whether they reply. A spreadsheet asks you to copy that by hand and you will stop within a month. A tool that reads the inbox keeps the last-contact date true on its own, which is the one thing a spreadsheet cannot do and the one thing this whole problem turns on.

Sources

Robin Dunbar's work on the size of stable social groups