There's several different options depending on how much you'd like to spend or how much time you'd like to invest; I'll provide links to everything at the bottom of this post. I'd recommend taking a class on CompTIA A+ and getting your certification. From there you can go on to Network+ and a range of other topics. You can also look at some online training materials such as lynda.com, vtc.com, and coursera.com. Coursera is free but they aren't a technology-specific site, but they do have a few IT related courses. I'd also recommend any of the podcasts produced by TWIT, especially Security Now.
Those were just the things off the top of my head. If I think of more, I'll post it here. It's also a good idea to read any technology blog or news website - you can do a google search and find lots of those.
CompTIA A+ Certification
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