Thing I'd do if I ever became an evil overlord (http://www.eviloverlord.com/lists/overlord.html) #96: My door mechanisms will be designed so that blasting the control panel on the outside seals the door and blasting the control panel on the inside opens the door, not vice versa.

Well, depends on your threat model really. If that's the door to a prison cell into which you think there's any possibility of throwing a hero who you have inadequately frisked for weapons, it's entirely back to front...

Bah! I am the overlord, "inside" is whichever side *I'm* on, damnit! :)