I babysat to start.
My first 'real' job was a holiday "fluffer and folder" at Lord and Taylor. It was my job to make everything look neat and pretty during the holiday season. I worked well enough (and some guy just stopped showing up) that they moved me to receiving. I unloaded trucks and distributed merchandise around the store as well as any other "special projects" management came up with. I worked there for 2 years while I finished high school.
My next job was as a music seller at Barnes and Noble.
After this I started as a full time college student.
After that, I worked for a small computer company. I mostly drove around the metropolitan DC area picking up broken computers/returning them, or delivering large amounts of computers to schools. I got to drive a forklift there.

Now I work for Loudoun-Fairfax Ambulance, and drive people places when they need to go by ambulance. Hospital->hospital or hospital->nursing home.
Wetzel