We've tried several of them.  Many are rather shallow, occasionally merely trendy...telling you what they think you want to hear.  But two we have continued year after year...because they are genuinely helpful, truly interesting, and clearly authoritative:

The Johns Hopkins University School of Medicine just sent us an ad for their Health After 50  newsletter.  It certainly looks interesting—and their Web Site is one of the best.  In particular, look at their,

1.   Get Moving  ...your single most potent antidote to aging: exercise.
2.   Don't Smoke   ...it's never too late to quit.
3.   Follow a healthy diet   ...rich in fruits and vegetables...low-fat...
4.   Use supplements wisely   ...fill gaps in a sound diet.
5.   Drink enough water   ...older, you're prone to dehydration.
6.   Avoid excessive exposure to the sun   ...protective pigment diminishes with age.
7.   Reduce stress   ...meditation, yoga, and exercise.
8.   Challenge your mind   ...learn new skills.
9.   Limit alcohol consumption   ...If you don't drink, don't start*.
10.  Cultivate satisfying relationships   ...positive social interaction...
11.  Consider preventative medicine   ...reduce high blood pressure...

Look at OHSU's "Virtual Wellness" site for an outline of one program that helps people follow such routes.

Look to this Explore Portland site for some exercise ideas and worthwhile social interactions in Portland, Oregon.  Look to our "Knowledge for Use" site for challenging kinds of possibly unfamiliar skills: learn some ways of looking at the world that are the ways that brought us several centuries of science...and might bring other, even more useful, outcomes.  Just maybe...