Do Something 100 Times
You will improve by doing something 100 times. You'll also gravitate to some aspects of that activity and explore the nuances. For example, I've written at least 100 words every weekday since Dec 1. The writing hasn't been good, but I've explored ideas. I write about an idea each day and I write enough to substantiate some logical reasoning. Now I have 29 ideas that I've thought about with at least some effort.
This brings up another benefit. I've produced 29 ideas. And now people can find them. I can find like-minded people this way.
Paul also tweeted:
There's also two ways to collaborate. You can find someone else to collaborate with or they can find you. Doing something 100 times helps with the first case - once you find someone, your portfolio will help you convince them that they want to work with.
With the second, it's even more powerful. People will see what you do and imagine how that fits in with what they do. There's more opportunity for serendipity.
A related idea:
Some people combat imposter syndrome with "Fake it 'til you make it." This makes sense because many skills or experiences are recursive - the more you do something, the better you get. But it's a chicken or egg problem, how do you start doing something?
By faking it 'til you make it, you start this flywheel. But committing to do something 100 times can also start the flywheel. In the spirit of the Permissionless Apprentice, do something for 100 times without asking for anything or expecting any response.
And see what happens.