ExploderWizard
Hero
Ring of Youth
Stops aging.
See, done!
To quote a memorable line from film:
" There isn't a government in the world that wouldn't kill us all for that thing."

Ring of Youth
Stops aging.
See, done!
The thing is, for almost all campaigns, it's just fluff. Most campaigns don't last long enough for aging to matter. This is part of why the Timeless Body ability is a tease. It looks like it's a cool, nifty ability, but it's really pointless since it has no effect unless you're going to use it to offset the physical effects of starting out with a middle aged or older character.
Timeless Body (Ex)
After attaining 15th level, a druid no longer takes ability score penalties for aging and cannot be magically aged. Any penalties she may have already incurred, however, remain in place.
Bonuses still accrue, and the druid still dies of old age when her time is up.
Timeless Body (Ex)
Upon attaining 17th level, a monk no longer takes penalties to her ability scores for aging and cannot be magically aged. Any such penalties that she has already taken, however, remain in place. Bonuses still accrue, and the monk still dies of old age when her time is up.