American Cancer Society's guidelines for diet and activity, plus, tips for a healthy lifestyle and community.

The American Heart Association movement is calling on all Americans and their employers to live longer, more heart-healthy lives through walking and other healthy habits.  Tools and information on how to start programs.

A quiz you can take to help answer what keeps you from being more active, from the CDC (PDF file).

Fitness Journal: A simple tool to keep track of your workout sessions, eating habits, sleeping patterns, and daily thoughts.

Glossary of fitness terms

Harvard Center for Cancer Prevention offers these online tools to help determine your risk for developing various diseases and personalized tips for preventing them.

How Fit Are You Now? These questions will help you determine your current level of strength and independence. Try returning to them again, after you have been strength training for three months, six months, and twelve months.

MyPyramid.com: Want to know the amount of each food group you need daily? Enter your information to receive a customized food guide.

Self-calculating tools

Shape Up America! Body Fat Lab, an informative, interactive, fun way to learn more about your percent body fat and the role it plays in your overall health.

Students Taking Charge toolkit is a resource designed to provide you with the tools necessary to develop and use your student voice to influence nutrition and physical activity policies within your school.

Walkscore.com rates the walkability of your neighborhood.

For Older Adults

About.com. Large collection of articles on exercise.

GrayIronFitness.com. Website focusing on fitness published by Marin residents, free newsletter.

A quarterly newsletter for midlife and older adults – resource with everything!

Fun 'n Games

Geocaching is a high-tech spin on the old-fashioned treasure hunt using hand-held GPS systems (Global Positioning System) for tracking down the cache via satellite. Caches are camouflaged containers containing little trinkets or perhaps geocoins, which are registered markers that can be traced and followed on the website.

Letterboxing is an intriguing mix of treasure hunting, art, navigation, and exploring interesting, scenic, and sometimes remote places.

Orienteering is an outdoor competitive sport that is similar to cross-country running, but with emphasis on map-reading and direction-finding skills.