Health Central: Symptoms of many health conditions as well as advice.
Intelihealth: A subsidiary of Aetna, they provide information from a variety of sources, including Harvard Medical School, the National Institutes of Health, and the University of Pennsylvania School of Dental Medicine.
Kaiser Permanente: Symptoms of many health conditions as well as advice. Kaiser Health & Wellness section has great information on living healthy as well as a host of other information.
The Mayo Clinic: Mayo is a team practice of medicine enhanced by medical education and research.
Web MD: Their credentials state: we have scores of news content staff members solely dedicated to your daily information experience on WebMD Health -- board-certified physicians, Emmy Award-winning journalists, and committed full-time community moderators.
Social Security Online
Social Security has added access to your Social Security information at www.socialsecurity.gov/mystatement which gives your benefit information and more. There is a "process" on-line for proving your identity and may just be a good idea to get a hold of it before some tries to hack it.