If you are a command key user, then you will probably like the Key Tip option.
Simply press the Alt key and letters will appear in the ribbon. Press the key that corresponds to the tab you wish to enter and more options will appear for that section.
Remember – if you see a double lettered option, hold down the key for the first letter, then press the second letter to use the option. If you navigated to the wrong tab, press the ESC button once and it will take you back one selection.