I will keep a special cache of low-tech weapons and train my troops in their use. That way -- even if the heroes manage to neutralize my power generator and/or render the standard-issue energy weapons useless -- my troops will not be overrun by a handful of savages armed with spears and rocks.

No matter how well it would perform, I will never construct any sort of machinery which is completely indestructible except for one small and virtually inaccessible vulnerable spot.

I will always carry at least two fully loaded weapons at all times.

If my doomsday device happens to come with a reverse switch, as soon as it has been employed it will be melted down and made into limited-edition commemorative coins.

After I captures the hero's superweapon, I will not immediately disband my legions and relax my guard because I believe whoever holds the weapon is unstoppable. After all, the hero held the weapon and I took it from him.

Before employing any captured artifacts or machinery, I will carefully read the owner's manual.

I will make sure that my doomsday device is up to code and properly grounded.