OK, sit down and write what interests you... What you like to do, what's fun, what do you prefer, what do you want to do that you haven't done already (something cool, fun). When you have the list start looking for clubs or places where people congregate. For example, if you put down that you want to take up photography as a hobby. Then find a place that teaches photography or a photography club. Go where people like you go.... most importantly have fun!