I'm a big believer in volunteering. In fact, my volunteer efforts led me to go back to school and change careers. You just never know where your inspiration will come from.
With the economic downturn we've experienced, many people need to focus their time on earning money, but if you have some spare time and would like to help others, the US government has created a list of worthy organizations you might not know about.
Go to USA.gov and click the link Volunteer Your Time.
Serve.gov is a special government-sponsored site that connects volunteers with worthy organizations. Enter keywords for topics that interest you and your location, and you'll be connected to organizations and projects that need your help.

This is a great idea. Seniors can, of course, be helped by volunteers. But they can also contribute a lot by volunteering themselves.