If you work in Adobe Photoshop, like any other computer application, keyboard short-cuts speed up your work flow considerably. I found this fabulous and extensive list for versions of Adobe Photoshop 5, 6 and 7 to Adobe Photoshop CS2, CS3, CS4 on Trevor Morris Photographics web site. (CS5 will be near identical to CS4).
I have been using the original Logitech G15 and it has up to 54 Programmable Macro Keyboard Assignments plus other useful tools. The newer version has 18. Whether you have a fancy or a standard 100+ key keyboard, Trevor’s lists are well worth a look.
Print them and keep them near your workstation.