Demotivational Posters, Apply Within.

[duke knooby]

http://verydemotivational.com/

lol

[daveake]

http://thumbsnap.com/s/JrE9glwx.jpg

[wolfy35]

All of the cheezburger sites are worth a visit if you have a sense of humour

http://media.mlxxfc.net/doublefacepalm.jpg

My faves are http://friendsofirony.com/ , http://probablybadnews.com/ and the classic http://failbook.com/