Friend of mine has a 5-year plan in terms of 'moving up the property ladder', which coincides with stuff like having babies at the right time, switching jobs etc.
As for me, I don't really do long term planning like that. I've kinda drawn up a list of (mostly trivial) things I want to do before I'm 30 or thereabouts (6 months time, might give myself a bit of leeway) though, including:
-Going to a casino
-Doing a pub quiz
-Going to a gym
-Starting some sort of blog
-Attending a rock festival
-Playing the stock market
I've deliberately set myself attainable targets which most people have already experienced by my age, rather than going for some kind of outlandish goals like "travel round the world / run a marathon / have a threesome with twin sisters / drive a grand prix car" etc.