Did you know that Windows Vista and 7 support symbolic links? What are symbolic links you ask? Essentially it is a alias for a directory or file. Symbolic links have been a feature of Unix based operating systems for many years. For example, let's say I have a directory named: "C:\really\long\directory\name".
So I don't want to type that over and over again, instead I can make a sym link named "C:\rldir" and doing a "cd rldir" moves into a directory that is an alias for the real directory.