Have fun, be active. Ride a bike instead of driving, for example.
So learning to play a new instrument, learning a new language - those sorts of things will pay dividends for years or decades to come.
The people you surround yourself with influence your behaviors, so choose friends who have healthy habits.
The more things for which you develop a fondness the richer the life you live.
A doctor may know more than a peasant, but a peasant and a doctor know more together.
It's hard to reach [the age of] 100. We're not programmed for longevity. We are programmed for something called procreative success.