If there is one tool in photoshop that most people use more than any other tool, it would have to be the brush tool. Remember that practice makes BETTER (no one can ever be perfect) and the more you utilize these shortcuts over and over in your workflow the faster and more enjoyable your editing will become.
I would suggest that you look them over and then give each one of them a try. Listed below (In no particular order) are ELEVEN shortcuts or tips that can really make your post processing workflow much more enjoyable. How so? By keeping your mind on the creative process and not fumbling around with the plethora of tools and extensive menu items within Photoshop, your mind will stay on the task at hand – creating a GREAT image! Photoshop shortcuts allow for a much more efficient and creative workflow.
Millions of photographers from around the globe use Adobe Photoshop to edit and manipulate their digital images. 11 Shortcuts to make you more efficient within Photoshop