Back in the 9.x days, there was a 8.5X11 "Poster" that had all of the keyboard short cuts (for each tool) and some explanatory text. The font was small, but you could laminate it and tape it to the top of your monitor. Not sure if ESRI produced this, but it was at the top of every monitor I had (many at the time...).
For 10.x, all I could find is this, http://www.esri.com/library/brochures/pdfs/arcgis-desktop-tips.pdf
Which is way better than this:
Which leads you to 5 other short cut pages. Definitely not something you can print off on a single page and tape to your monitor....