http://psd.tutsplus.com/tutorials/tools-tips/10-custom-keyboard-shortcuts-you-need-to-be-using-in-photoshop/

By default, Photoshop comes packed with keyboard shortcuts that you can use to speed up your workflow. What you might not know however is that there are also a lot of commands that do not have keyboard shortcuts assigned to them. In this tutorial, we will show you a few of our favorite custom keyboard shortcuts that you can use to work much faster in Photoshop. Let’s get started!