Before building any system, decide what you want from your relationships and why. Opportunities, retention, referrals, a brand, or simply feeling good.
The idea
Unfocused effort is a common reason people burn out on relationships. "Building my network" is a should, like stretching or flossing, and nobody keeps doing a should for long. Start with why. Your relationships might be there to close more business, keep the clients you have, bring in new opportunities, build your reputation, or just because having friends feels good. Be honest about the output you want: money, referrals, a key objective, social capital. Your sphere's job is to bring you opportunities; closing them is your job.
How to do it
Finish the sentence: "I'm investing in my relationships right now because ___."
If the answer is "to build my network," push: for what? A job, clients, a cofounder, someone to call when everything's on fire?
Still shallow? Have someone ask you "Why?" five times.
Write two or three goals, each with the reason it matters. You don't need ten.
Check that none of them is really an outcome. In my coaching our example of an outcome posing as a goal was "15% more in GCI."
Example
When I ran the exercise on myself, it went: hiring great people, then growing the company, then building something great, then the fact that I have loved making things since I was a kid. Four whys, and the root was creation. My driving why has shifted over the years too: investors in one season, key future hires in another, enterprise partners in a third. Now it's a kitchen cabinet of people I can call for advice and ideas. Different season, same actions underneath.
Watch out for
Spiraling over finding your One True Why. It's fine for your why to change with the season.
The Tuesday Test: Finish "I'm investing in my relationships because ___." If that answer wouldn't get you to send a message on a busy Tuesday, it's a should.
Prioritize Around Your Goals: Before sorting anyone into A/B/C, name your goal and the types of people who help with it, so you know whose names to look for.
The Kitchen Cabinet: Beyond business-relevant contacts, make sure your network includes a professional contrarian, an industry oracle and a universal connector.
Calculate Your Relationship ROI: Estimate what your relationships are worth: count your referrals and repeat clients, put a dollar value on each, then apply a realistic lift.