First, you take a yellow legal pad and create a pros and cons list.

Just fucking with you.

Try one thing at a time. If you have 200 interests, I guarantee you that you've never actually done most of them. Pick one, any one, and do it. Set aside some time (ideally 90 minutes) and do it every day for two weeks. You may find that you like the idea of the thing more than you like actually doing that thing. If you really enjoy it, keep doing it and ignore the rest! If you don't like doing that thing, pick another of your 200 out of a hat and try that for two weeks.