I'm 23 and am a systems Analyst. I work on my company's helpdesk working case issues and every couple weeks or so I sit on the call center where I handle maybe 30-35 calls a day. Once every 4 months or so I'm primary on call for a week doing 24/7 support. Our "clients" are fellow company employees based in our building at headquarters (apprx. 3000 people) or elsewhere across the US and internationally (apprx. 30,000).
Mainly, I support PC, Windows, application, wired/wireless network connectivity, printer, print server, Novell, Active Directory, Citrix, Lotus Notes, Remote connectivity (iPass/Cisco VPN), handheld (blackberry), laptop/desktop hardware, thin client, and terminal emulation issues. Its an entry level position at a large corporation; it allows me to get exposure to a variety of issues/platforms. A lot of my work is walking clients through solutions by contacting them over the phone, and remote controlling into systems when possible.
I have a college education but am still finishing my bachelor degree. I started at the company 2 years ago as an intern - I went to a presentation some HR people from my company were doing at my college, ended up getting an interview and a job offer to intern. About 6 months ago my supervisors sat me down and just made me a full time job offer which I accepted (they're paying for me to finish my degree now, suckers).
My best advice for those of you entering college - find yourself a good internship or co-op program. You will learn more from this experience than from any of your classes, and it places you leaps and bounds ahead of your fellow classmates. It will make the problem of finding employment after college a non-issue, as well as making knowing what you are or aren't looking for much more apparent to you.