I simply attended a lot of hacker/tech networking events to meet other entrepreneurs hoping to find a co-founder. And in the process, I met a lot of other people, some of whom turned out to be investors or working for investors. I also met many good entrepreneurs with good ideas, but none (yet) with an idea that has good enough potential (in my opinion) to commit myself to for the next few years. I'm still searching, but until then, I will continue to experiment.