Some people with far too much time on their hands at the University of Virginia Computer Science department created The Oracle of Bacon at Virginia , a computer program, to figure it out. It's based on work experience, primarily through info from the Internet Movie Database. My gun-slinging friend Carina in Texas typed me in because she calls me her Hollywood Mogul friend (We met through Comic-Con in the 1990s when she was the Treasurer and I was her assistant-- then I was the Maid of Honor at her wedding. Sweet!)
Anyway. Carina found that I'm only 3 degrees seperated... When I did the search and added in TV credits, I found it was only 2. though I think that it's probably shorter than that through social connections.
It doesn't always work. I couldn't make Steve's connection, which is silly because he has more film credits than I do, and the Oracle says he's not on IMDB (also incorrect, as you can see here). You have to play around with the search parameters but it's still kind of fun.