Almost everybody has some hobbies or interests. If you have been thinking about starting a business, then perhaps you could take advantage of the fact that you might have various interests. If you like cars, then you could consider selling car accessories. If you like graphic design, then you could be designing websites. If you like dealing with people, then you could always have some consultancy business. The possibilities here are limitless, but what is important is to take into account your interests and try to utilize the fact that you might have knowledge about some subjects.