Courier. A fairly common form of income. Choose a proven firm: certainly some of my friends have worked in this way. You will have free schedule and only task – to deliver in time a particular product (the document).
Social research interviewing ads. Only a couple of hours in a day and a penny in his pocket.
Promoter. Most often it is hourly pay and flexible schedule. You will need to advertise a specific product and give advice. If you have to work with food, take care of sanitary book.
The fast-food chain. From year to year such places are happy to take young people to your company. Here all in an adult: a contract of employment, overalls and all the benefits of working citizen.