I don't have an answer for you, but wanted to let you know I'm in the same boat. I hope someone gives a good answer, it might help us both.

One of the classic questions is what would you be doing with your time if you didn't have to work (highlighted and lampooned in Office Space). It's simplistic, but a good way to start. Say you would travel. Then maybe you can look into jobs that would have you traveling often. Think about your qualifications and schooling. Do you have a degree? Do you still enjoy the subject your degree is in? If so, think about what else you can do with it. If you don't have a degree, or you got a degree in engineering and hate it, think about what your career needs to have. What are your absolute necessaries? Do you go stir-crazy in a cubicle? Do you need to do something different every day? Or do you love to know exactly what's coming? Do you want to meet new people, or have a very steady set of coworkers? Think about every possible thing you would like to do, as well as what you know how to do. During these exercises, you may stumble upon exactly what you want to do. If that happens, pursue it! Even if it means going back to school to get what you want, do it! Also, remember that you may have to do some other job while paying for this school. If you are still having trouble, Google "aptitude test" and take a few. Not one. A few. But only free ones. These will suggest some options for you that you might not have thought of before. Also, you can ask your friends and family what they think you might be good at and enjoy. Sometimes, they know you better than you know yourself. Good luck in your search, and don't stop until you're happy!

Just try every job you are interested in. If it offers low payment, think about it as you pay yourself to have the experience. "Life is short for the wrong job"

Do you have any hobbies? When I was younger I used to take apart any electronics I could get my hands on. I didn't really know what I was doing, but after a while, I was actually fixing things. I checked out books from the school library and taught myself what the different components were and what they did. I'm 35 now and it wasent until my PS2 broke and I didn't have the $90 dollars they wanted to fix it. So, I bought a book online about PS2 repair and troubleshooting. Last year I went into business for myself fixing JUST game consoles and iPods. I finally quit my regular job about 2 months ago and now I'm a stay at home dad and I do all my repairs here at my computer station! I'm looking for some one who knows how to take all my old videos and photos and make a standerd photo album with a place to put DVDs of my family for reunions and such. There are alot of things you could do AT HOME. Business permit = $68 tools = $100 being a stay at home dad = priceless! I hope this helps you a bit.