I have to agree with the farming. It can be hard work, but I bet you'd get a kick out of it, and meet some interesting people. It's a good way to make you strong in mind, body and soul. Be a good worker, responsible and you'll find it very rewarding. Chances are you won't have someone looking over your shoulder all the time ( watching every move you make ). When you gain somebody's trust it's a great feeling that's hard to top. Good Luck and have fun in what ever you decide to do.
You can get a job at a farm, babysitting, Bagging or stocking at a local grocery store and distributing the mail. Although most states require that you have a work permit to work and can show that you are able to attend school and work at the same time. You are able to get this at the guidance department of your school.