Go when you feel the urge.
Flush when you're finished
Wash and dry your hands
Throw your trash away
Help keep the restroom clean
Each of these posters is included with both color and black & white so you can decide what fits your environment (and ink budget) best.
Posters are formatted for 8 1/2 x 11.
I encourage having them printed at a place like Office Max for best results on color because you can get it done for less than or about $1 a page and they'll look very nice.