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