DOS prompt command history

When working in a DOS prompt you often need to repeat commands, or at least execute very similar commands. There are a few nifty ways to repeat commands in a DOS prompt.

F3: Copy last command to command line.
F7: Shows your entire command history. Press enter to select a command and execute it. Press -> or <- (right or left arrow key) to copy the command to the prompt, so you can modify it.
F8: Command completion (like filename completion). Enter the first few letters of any previous command, press F8 to rotate through all previous commands starting with these letters.

Nifty