One suggestion to figuring out what type of business to start is to use Daniel Pink's method of writing down 5 things you're good at, and 5 things you love to do, and looking for the overlap. Then ask yourself if anyone will pay you to do those things.
The explore part of this discusses talking to those who have done this before. Interview others that have started their own businesses to make sure that you can avoid any mistakes that they have made. The first step is finding out what skills, knowledges, and experiences are required from these business owners you will interview. The second step is making a list of these skills, knowledges, and experiences you have. Then you must subtract the first list from the second to determine which skills, knowledges, and experiences you must acquire before you begin. This can be written as A-B=C.
The final step is to gain some feedback from those around you. You can use resources like www.checkster.com which sends a few friends and family members an email, has them answer a questionnaire anonymously, and then sends you a summarized report of their responses. This may help you understand if you're cut out for this.
Just remember, this is risky, but there is risk in everything. And remember to have a plan B, just in case this does not work out.