In the four early stage startups I've gotten into: 1) Found it through an agency (this was in the late 80s, though). 2,4) I knew someone who was already

In the four early stage startups I've gotten into: 1) Found it through an agency (this was in the late 80s, though). 2,4) I knew someone who was already working there. 3) I knew someone who knew someone who worked there. So basically through your network.