Custom PC Guru is a useful resource with simple, easy to understand guides on how to go about choosing parts for your new computer and assembling it. As well as this, it has a nice, up to date blog with the latest technology news. Check it out here
Scott Mueller is the author of a popular book called Upgrading and Repairing PC's which is inits 18th edition. This is an excellent book with heaps of information about all the componenets and varieties needed to build or upgrade your own computer. All of his books include a DVD with 2 hours of content. Here is a link to some of his free videos.
Build-Your-Own-Computer.NET is another good site where you can learn to build your own computer. They have a useful glossary for understanding computer jargon. I found it very useful and it is a good place to refer to if you don't understand a particular term. Click here to visit the Glossary
Whirlpool Broadband Forums are a good place to visit if you have any troubles with your computer. The community is very helpful and friendly. If you ever have trouble with your computer, this is one of the first places to look
Build-Your-Own-Computers.com is a site I like to visit as it provides lots of trouble shooting tips and some simple guides which many people look for such as how to reformat a hard drive and how to set up a wireless network. Click here to find some troubleshooting tips
Build-Your-Own-Computer-Tips.com is a site I find quite useful. It is very similar to this site and also has some useful guides you might want to read. Click here to visit the website
Here are links to all of the major motherboard manufacturers' websites. These are useful to check the compatibility of your motherboard with certain components, what features it has, the layout of the motherboard as well as BIOS updates.