as most of the guys have said, start at the bottom and work you way up, thats how most progress
also be sure you are interested in IT and the computer industry, not just doing it for good $
if you are genuniely interested then start playing around with things at home
setup linux at home, get a cisco switch at home, use vmware on your pc
and play with windows 2000 server, windows 2008 server, linux etc
play around with networking, active directory, build your own domain controller
have a play around with cisco router emulator and so on...
when i hire guys i always look for guys who are actually interested in IT and computers
not just doing for it $, they are pretty easy spot. guys who play with the technology
at home, have a good interest and willingness to learn. thats a key component
also teachs you problem solving, and trying to learn/understand things that might be out of your current scope
theres always someone who can help, shed advice, point you in the right direction etc.