I have recently become a huge fan of SkyDrive.
By default the SkyDrive directory is located C:\Users<USER NAME>\SkyDrive
I am lazy and having a drive letter mapped to this directory made scripting and command line work much easier.
Using the SUBST command you can map any directory to a drive letter.
The syntax is:
SUBST <DRIVE LETTER>: <PATH TO DIRECTORY>
For my SkyDrive example the command looks like this:
SUBST S: C:\Users<USER NAME>\SkyDrive