Bash profile file for OS X

Opening file:

$ vim ~/.bash_profile

File contents:

PS1='\w: $ '
git='/Users/user/Documents/SourceCode/FromGITHub'
profile='/Users/user/.bash_profile'
sim='/Users/user/Library/Application Support/
 iPhone Simulator/5.1/Applications'
desktop='/Users/user/Desktop/'
docs='/Users/user/Documents/'
dl='/Users/user/Downloads/'
mclient='/Users/user/Documents/mail/'

Activation:

$ source ~/.bash_profile

Usage:

$ cd "$mclient"
$ cd "$sim"