Recommendations for donating to an anti-death cause

I’ve recently had the bad luck of having numerous people close to me die. Though I’ve wanted to contribute to anti-aging and anti-death research for a while, I’m only now in the position of being stable and materially well-off enough to throw around semi-serious cash.

Who should I donate to? I don’t want to do anything with cryonics yet; I haven’t given cryonics enough thought to be convinced it’d be worth the money. But I was considering the Methuselah foundation.

Suggestions?