Stefan Sagmeister's "Things I have learned in my life so far". They're a little bit hippie, but I like them:
Complaining is silly. Either act or forget.
Thinking life will be better in the future is stupid, I have to live now.
Being not truthful works against me.
Helping other people helps me.
Organizing a charity group is surprisingly easy.
Everything I do always comes back to me.
Drugs feel great in the beginning and become a drag later on.
Over time I get used to everything and start taking it for granted.
Money does not make me happy.
Traveling alone is helpful for a new perspective on life.
Assuming is stifling.
Keeping a diary supports my personal development.
Trying to look good limits my life.
Worrying solves nothing.
Material luxuries are best enjoyed in small doeses.
Having guts always works out for me.
Here he gives a short talk about the things he has learned, and the art projects that come with them.