Baby sitting or pet sitting is a good way to start. Maybe someone you know through your parents friends, family members or if your involved in any extracurricular activities like sports or church you can find someone that needs a baby sitter.
All you have to do is sign up and take surveys for a couple dollars here or 50 cents there, and once you reach $20 they will send you a check at the beginning of the month. But, it can be time consuming. It's easy to make at least $5 a day if you're up for it.