AutoHotkey Expert

How we create keyboard shortcuts or remap keys, a Beginners Guide
Download
AutoHotkeyInstall.exe

I love this software but some of these tricks were even news to me. 

Batman 7/28/2010

Access the Command Prompt: Ctrl+Alt+H, if you're a command-line junkie, you're probably already aware of how easily you can access the command prompt from the context menu, but if you want something even easier, you can use AutoHotkey to create a shortcut key that launches a command prompt already started in the same folder that you're currently browsing in Windows Explorer.
To create this hotkey for yourself, create a new AutoHotkey script:

#IfWinActive ahk_class CabinetWClass ; for use in explorer.
^!h::
ClipSaved := ClipboardAll
Send !d
Sleep 10
Send ^c
Run, cmd /K "cd `"%clipboard%`""
Clipboard := ClipSaved
ClipSaved =
return

#IfWinActive

Empty Recycle Bin: Windows-t, will automatically empty the Recycle Bin when executed. When it's finished, it will show a message telling you that the trash has been taken out.

#t::

FileRecycleEmpty, C:\

MsgBox, The trash has been taken out.

return

There are dozens of "Boss Key" applications out there that hide windows with a simple keystroke whenever the boss walks by.