If you want to go back a page when browsing, you don’t need to use your mouse. Just press the Backspace key.
Of, if you don’t want to reach allll the way up there–like if it’s been a long day and you’re sitting on the sofa watching TV while randomly surfing– you can use the Alt+left-arrow key for Back and Alt+right-arrow for Forward.
I assumed most people knew these functions until last week when a friend saw me go back a page without using the mouse and asked, in amazement, “How’d you do that?” I showed her and you’d think she had discovered sliced bread.
Moments like that make me wonder how many shortcuts are out there that I don’t know about.