One of the very best ways to work more efficiently on your Macintosh is to use a few simple command key shortcuts. Every program has some and many of them are the same in nearly all of your applications. If you just learn and use these basic ones, you'll find yourself working much more expeditiously.
Explore the programs that you use most frequently and your most repetitious actions within those programs. You'll ordinarily see them listed in the pulldown menus right next your menu commands.
Even if you just learn and use these twelve, you'll work faster and happier.
Alan