I use Remote Desktop all day at work.  It is especillay helpful when writing documentation.  One of the problems I always run into is trying to remember which keyboard short you can use to capture a screen-shot in a TS session. Since I had to dig these up  again today I decided to post them here where they are easy (for me) to find.

Shortcut  key             Description
ALT+PAGE  UP          Switches between programs from left to right.
ALT+PAGE DOWN     Switches between programs from right to left.
ALT+INSERT              Cycles through the programs in the order they were started.
ALT+HOME                Displays the Start menu.
CTRL+ALT+BREAK    Switches the client between a window and full screen.
CTRL+ALT+END         Brings up the Windows Security dialog box.
ALT+DELETE             Displays the Windows menu. 
CTRL+ALT+(-)            Places a snapshot of the active window, within the client, on the Terminal server clipboard
                                 (provides same functionality as pressing PrintScrn on a local computer.) 
CTRL+ALT+(+)           Places a snapshot of the entire client window area on the Terminal server clipboard
                                  (provides the same functionality as pressing ALT+PrintScrn on a local computer.) 

NOTE: for last two commands use the symbol on the numeric keypad without the ().
keypad