What feels right to you. As Esther Hicks would say, use your "emotional guidance system." If I tell you you should be a garbage man or woman (no offense to garbage men or women, as they do a huge service) does that feel right? What about a teacher? Business owner? Blogger? Start asking yourself and see what feels the best. The answer that elicits the best feeling is most likely the right one. As you think more and more about it, it should give you a greater and greater feeling regarding it.
Also, there are resources such as the book Please Understand Me II which can tell you what kind of personality type and job you are suited for based upon your personality.
Here are two questions, taken from Deepak Chopra’s book, The Seven Spiritual Laws of Success, that may help you.
“Sit down and make a list of the answers to these two questions: Ask yourself, if money was no concern and you had all the time and money in the world, what would you do? If you would still do what you are currently doing, then you are in dharma (living according to your higher purpose), because you have a passion for what you do – you are expressing your unique talents. Then ask yourself: How am I best suited to serve humanity? Answer that question, and put it into practice. “