Sure most of you know this already, but...
Mapping a virtual drive to a directory:
In the command prompt, you can map a directory to an unused drive letter (T: for instance) with
subst <drive> <path>
Example: subst t: c:\Users\Admin\Desktop
In the command prompt or in explorer(My Computer, specifically), you will be able to access the drive(T in the example) and it will redirect you to the path you set. Useful for shortening paths and... use your imagination here. Mine's drawing a blank. (In Win7 and probably Vista, this will not work in My Computer if you ran CMD as an administrator.) You can reverse this with:
subst /D <drive>
Backups:
Instead of using some third party backup software, you can use a built in command in your command prompt, robocopy, to back up your files.
robocopy <source> <destination> /copyall /r:0 /dcopy:t /mir
Example: robocopy C:\Users\Desktop\LuaVoice F:\Backup\LuaVoice /copyall /r:0 /dcopy:t /mir
This will copy everything, subdirectories included, to the destination from the source (with 0 retries, preserving file information and timestamps.) This only works for Windows Vista and Windows 7. For XP and older, you can do this similarly with XCOPY
xcopy C:\Users\Desktop\LuaVoice F:\Backup\LuaVoice /c /d /e /h /i /k /q /r /s /x /y
"Godmode" (Win7 only[maybe]):
In Windows Explorer(even on your desktop), right click, go to new > folder. Insert the following as the folder name:
GOD Mode.{ED7BA470-8E54-465E-825C-99712043E01C}
This should give you a directory of administrative tools and options. (Credits to whoever I stole this from... don't remember where.)