Tab-Completion in Terminal and Finder

If you use the command line reasonably often, then you probably tire of typing out long folder names. Fortunately, there's a simple shortcut to autocomplete file paths: Tab. Just type in enough letters to differentiate it from other files in the file path then hit the tab key. As an example, to change to your Downloads folder, you could type:

cd ~/Dow [Tab]

Whereas, to switch to your Documents folder, you would type:

cd ~/Doc [Tab]

This also works in Finder's "Go to Folder…" (Cmd-Shift-G) shortcut.