Demotivators
I used to have a great poster of a single lit match poking out about an inch from about a hundred other matches. It was a parody of those motivational posters, and it said something to the effect of “Burnout: attitudes are contagious. Mine can kill you.” in my former days, I kept it on my wall. Now despair.com has put out a whole series of new Demotivators
Fun stuff.