Technibble.com- this is a great computer technician resource, it has all kinds of great material on everything from creating advanced recovery boot disks to starting your own computer repair business. Very helpful.

W3schools.com- an excellent Web design resource.

Zen Virtual Apps- it has clickable screenshots for Windows and Macs that show the most common Windows people will open when troubleshooting internet problems. Good reference for phone support.

Microsoft Technet's Sysinternals- a software resource for IT professionals, they have given the IT community a lot of great tools to work with Windows such as PageDefrag, AutoRuns, and Process Explorer.

MajorGeeks.com- constantly updated with the latest software of all different kinds, both freeware and shareware.

Source Forge- hundreds of thousands of open source software (free) programs.

Safer Networking forums- An awesome virus removal forum where the people answering questions are approved to do so. Hosted by the makers of Spybot Search & Destroy.