Networking :) I was invited to join a tiny community of product bootstrappers a few years ago, which led to me helping them out with various things, and them in

Networking :) I was invited to join a tiny community of product bootstrappers a few years ago, which led to me helping them out with various things, and them in turn helping me out quite a bit with my own stuff. This led to some paid engagements, which then led to the retainers.