Demotivational posters.

I found this website somehow, they make posters that look like the motivational posters you so often see in workplaces, but they're sarcastic. 

I love this one.

It says "Hundreds of years from now, it will not matter what my bank account was, the sort of house I lived in, or the kind of car I drove... But the world may be different because I did something so bafflingly crazy that my ruins become a tourist attraction."  http://www.despair.com/lithographs.html