Newspaper, starting @ 13.
Newspaper routes are frigging great man, good hour and good pay. if you consider how many hours you actually have to work, your age, your work experience (or the lack of), how easy the job is, and how much free time you actually have left the rest of the day, it's a great job (or for tax purpose, self employed business =). I held 2 routes in the morning and I did it for 5 years until I went to college.
Not to mention the genorous Christmas tips from the customers =)