Custom Guide - quick references for many apps including OneNote!
Hat tip to John for pointing this out and also thanks to lifehacker who posted this yesterday:
CustomGuide Provides Quick-Reference Sheets for Microsoft, Apple, and Adobe Products and the program featured in the image was OneNote 2007 : )
The folks at Custom Guidehas a great set of quick references that I would encourage people to check it out, here is the direct link to the OneNote 2007 guide (pdf). Enjoy and thanks Custom Guide!