The web site TopRetirements.com is primarily designed to promote the benefits of living in a 55+ community. I am not taking a position on that issue at the moment, though it could form the basis for an interesting blog sometime down the road.
Life Changing Activities
This link will take you to a page on that site with some good information on a variety of topics. Scroll down to the Volunteering section and click on the 7 Live-Changing Activities for Retirement. While not particularly new information, it is good to review the basics from time to time. On the home page are all sorts of "Best of" lists that might spur some thoughts for you.
Part of the fun of blogging is stumbling across little nuggets of information or interesting paths to follow. This one will only take a few minutes of your time, but is worth the click.