I found a niche at the intersection of art, music, engineering, and manufacturing. I basically said to myself in 2005, "What am I better at than anyone else?" and proceeded to build my niche into a viable business. At this one thing, I'm confident (not because of my own evaluation, but the judgment of my target market) that I've found something I'm very good at that's worth pursuing. Yes this is very general advice, but it worked for me.... hope it sheds some light.