American Heart Association - The American Heart Association’s official site on hypertension. Includes info about risk factors, meds, lifestyle changes, and why you need to control your blood pressure.
Hopkins Hypertension - This site from Johns Hopkins with some general information about hypertension. It has quick information about risk factors and how to control blood pressure.
Blood Pressure Forum - Join other people with high blood pressure to share your story and ask questions. Keep track of your blood pressures online here.