My first job was at 18. I was the security dispatcher for a theme park. It was pretty awesome, but the commute was at least a half hour without traffic--not really worth the $8/hr. It taught me a lot about multi-tasking, using a "professional phone voice," and I met a lot of great people. However, I was going through so much personally that I couldn't really appreciate it fully.
After that, I worked a multitude of jobs including a Barnes and Noble employee (3.5 years, 3 locations), a summer camp counselor, a restaurant hostess, a youth ministry intern at church, an assistant dog groomer, and a "professional" babysitter (complete with website and steady clients). Mind you, I always had 2-4 jobs at a time so I can't even begin to sort them out for you. When I wasn't working (haha, whenever that was), I also volunteered as an Assistant Pet Therapist and a photographer for the humane society.
I'm such an overachiever.