OK, I admit I do like keyboard shortcuts most than most lawyers (in spite of the fact that I’ve probably forgotten more of them than I retain.) It is almost always quicker to hit a key combination than to grab the mouse and start aiming for your target. Memorize and use the keyboard shortcuts for tasks you do several times a day or week. The mouse clicks are for things used less frequently.
KeyXL.com claims to be "the largest online database of keyboard shortcuts in the world." After a few experimental searches I didn’t find anything to make me doubt that. You can get long printable lists of shortcuts for many programs. Hat tip to Tom Mighell for the link to KeyXL.