The secret of how to make money is not in paid work, and to find creative ways to solve other people's problems. To do this, you don't need a degree. Good buy — "the Hunt" on the cheap goods at flea markets and garage sales. If you have knowledge in a specific area (for example, crockery, Cutlery, historical artifacts), then you should attend the sale at the local markets to find interesting things. From time to time on the Internet ads appear on a search of participants for various studies. Look and you will find something worthwhile.
Participation in medical research. If just the thought of it doesn't scare you. In some studies you may be asked (especially if you have some disease) test new treatments or medications that can have negative side effects. In other studies can ask participants to perform physical exercise without any long-term side effects.