If you are interested in living a very long time, you might consider cryonics. Since there are many popular misconceptions about cryonics, if you are at all desirious of becoming better informed, please peruse the following links. I didn't aim at comprehensiveness here, though, I believe, I've gotten the major organizations down. So please don't be offended if your organization or site is not included. I had to set some cut off for getting this section up. Happy surfing!
Alcor Life Extension Foundation
CryoNet A cryonics mailing list. This is a good place to seriously discuss cryonics. There's also lots of information at this page.
Cryonics Association of Australia
Russian cryonics? Most of this site is in Cyrillic.