The following sites have proven helpful for technical and other resources. Click on the one that looks interesting to you. Since it will take you away from TRC Resource Center, you might want to bookmark this site before leaving.

Fast updates:
www.versiontracker.com
This site offers an updated list of new patches and common software.

Great Mac information sites:
www.machome.com
www.macfixit.com
www.macintouch.com
www.macnologist.com

Virus detection updates for Norton Anti-Virus:
www.symantec.com/avcenter/vinfodb.html

Teaching materials:
www.agfahome.com/publications/
For color separation theory and practice, printing basics, imposition and platemaking. 

For diet and fitness:
www.thriveonline.com
www.lifelines.com
www.healthfinder.gov
www.mayohealth.org