The SysAdmin Ten Commandments
I. Thou shalt respect thy user
It is paramount that you respect the user and their data. Don't steal their MP3s, don't look at their porn. When working with email, look without reading. Respect them and they will respect you.
II. Thou shalt empower the user
The user is the customer. The system is not yours, it is theirs. Provide users the tools they need to be successful and they will be happy. Give them space to experiment, learn and create. Do not hold users back.