I worked in my college's computer labs, checking people in and out, and helping them use software.

At the company where I got my first dev job, I started out in tech support, and did that for a year or so before transferring into the engineering department. I'd been doing (non-IT) phone-based customer service for a bank before that, which probably helped me get the tech support job.

I'm not sure if data entry counts, but I had a couple of those jobs during and after college.