There is a little piece of paper tacked to my board here that came from a work by Fischli and Weiss. It is from a tongue-in-check work by the artists where they cribbed a piece of found motivational text and then had it enlarged and painted on the exterior of a building.
Tongue-in-cheek or not, the list is a good daily reminder for me.
Here is the list. Also check out the link below that for some photos of the actual work.
How to work better