I am a fan of Clipboard manager gadget from Jan Zeman
It is a very useful gadget and lets you to use your clipboard very efficiently.
I have created a customized version of this gadget for myself with Height 260 ( instead of 160 ) which shows 13 last items of clipboard ( instead of 7 ).
You can download it here :
http://adminsehow.com/files/ClipboardManager-H260.Gadget