Maximum PC ( http://www.maximumpc.com/tags/back+issues )has some great back-issues online as a resource and has some amazing guides on building a home PC that games like a pro and will save you tons of money. they also have some of the best reviews for the latest and greatest parts.
Newegg.com, as tired as this sounds, is also an amazing site for parts.
One last addition to set you on the right track is http://lifehacker.com/, great ideas for anything and everything with less ads and clutter than Instructables.com.
Hope that helps.