Here are some tutorials on how to do just about everything you'll need to do with Pretty Link. If you want to have even more capabilities such as automatic keyword replacements, auto pretty link creation, auto tweeting and more — you may want to look into upgrading to Pretty Link Pro (if you haven't already).
Getting started with Pretty Link on your WordPress Website
Setting up Pretty Link Redirects
Organizing your links with Pretty Link Groups
Tracking Hits on your Pretty Links