Here are my five things I revert too whenever I look at either Operating Systems or applications:
Less than 3 “clicks” to perform most operations
Easy navigation for those unfamiliar with it
Backwards and forwards compatibility
Hardware compatibility
Understandable and limited versions

To use these commands begin by typing in the command below and when you have the syntax correct the color of the command will change to a light blue. Example: kind:=document.

How to remove the Libraries icon in Windows 7 from the navigation menu within Windows Explorer.

A simple little application that lets you choose the icon you want to replace the library icon with as well as the ability to revert it to defaults.

The top 10 utilities every computer technician should have in their toolbox!