Normally, when I think of motivational posters, I think of a poster with a very serious and boring picture on it and a deep message that’s meant to help people get through the tough times in life. You know, something that inspires. If do a search for Motivation Posters in Google Images though, you’ll get some much more interesting messages.
They’re all user created images that are a lot like those LOLCat type of photos, so everything you find will be pretty funny for the most part. To make it easier to check out all these pictures, you should download the Piclens plugin for Firefox.