Photoshop Keyboard

I've always struggled with the keyboard shortcuts to Photoshop.  I watch with increasing frustration when video tutors quickly move from one tool to another, without the laborious need to move and click on the mouse to select the different functions.

Well today, I received a simple rubber overlay for my Mac keyboard with a helpful indication of the functions of the various keys.  It fits perfectly and I really think it will help reduce the time I spend on processing images I take into Photoshop.  All that for less than the price of a cup of coffee!