If you want to be happy for a few minutes, then have sex.
If you want to be happy for a few hours, then get drunk.
If you want to be happy for a few days, then slaughter a pig and eat it with your friends.
If you want to be happy for a few months, then marry a woman.
But if you want to be happy for a whole lifetime, than spend your time with <insert your favourite hobby here>

Originally a Chinese saying, where the favourite thing was "a garden", but can be applied to nearly everything, e.g. noding