How to be A Successful Evil Overlord by Peter Anspach:
http://www.proft.org/tips/evil.html
I like the following:
88. If a group of henchmen fail miserably at a task, I will not berate them for incompetence then send the same group out to do the task again.
95. My dungeon will have its own qualified medical staff complete with bodyguards. That way if a prisoner becomes sick and his cell mate tells the guard it's an emergency, the guard will fetch a trauma team instead of opening the cell for a look.