1. You are not Superman.
2. If it's stupid but it works, it isn't stupid.
3. Never draw fire; it irritates everyone around you.
4. Odd or conspicuous objects attract fire. Never lurk behind one.
(many, many more here)
The Evil Overlord Devises a Plot
1. My Legions of Terror will have helmets with clear plexiglass visors, not face-concealing ones.
2. My ventilation ducts will be too small to crawl through.
3. My noble half-brother whose throne I usurped will be killed, not kept anonymously imprisoned in a forgotten cell of my dungeon.
4. Shooting is not too good for my enemies.
(much much much more here)
Lifted from Ayamegusa's DA journal