This is sort of a noob post, but I'd forgotten about these, even though I use the command prompt almost hourly at work.
With a cmd shell open:
Press To Get
F1 Last command displayed one letter at a time
F3 Repeat last command
F5 Displays the last commands one-by-one
F7 Displays the command history
F8 Cycles through the last commands, typing a character or two will cause it to match the prefix
There are a couple more, but they don't always respond correctly and IMHO are less useful.