One very handy thing I mentioned before is that you can hit tab to auto-complete file names and directory names from the command prompt. If you are in the command prompt, you've likely got your hands on the keyboard so tricks like these are very handy to speed things along…

Moving around...

Ctrl-Left Arrow = move back one word
Ctrl-Right Arrow = move forward one word
Home = move to beginning of line
End = move to the end of line

Recalling commands you entered...

Up Arrow = display previous command entered
Page Up = display oldest command entered
Down Arrow = display next command entered
Page Down = display newest command entered

Repeating Typed Text...

F1 = repeat first character typed in preceding line (hit again for next)
F2 + = repeat first character typed in preceding line up to (where key is the first character in the preceding line to which you wish to repeat)
F3 = repeat text typed in preceding line
Esc = erase current line
F7 = show all entries in command buffer
Alt-F7 = clear all entries in command buffer