I've been using a keyboard chart I made up for Blender
to help me remember where all the basic and essential hotkeys are for the various tools I often use when modeling objects for game use. If you'd find something like this useful yourself I've added it to the keyboard tutorial page
; if can be downloaded as both a high-res PDF
file and an alternative high-res PNG image
(both at 300dpi). Also available is a 'blank' keyboard chart, again in high-res PDF and PNG
so you can markup you own hotkey locations. Chart may be updated from time to time.
[EDIT]updated 19th Mar 2014