Health on the Web ... places to go and things to learn:

The National Heart, Lung and Blood Institute
The American Cancer Society
Rx List (everything you want to know about your medications)
HealthCentral.com (one-stop shopping center for health topics)
Allshouse-Associates (learn all about yourself)
Office of Disease Prevention/Health Promotion (extensive guide)
WebMD (latest informtion on a variety of health topics)
Centers for Disease Control (the latest information)
American Academy of Family Physicians (talks in lay terms)
Everything there is to know about Social Security