-Meat obtained from enemies that isn't cooked can be frozen or burned and become edible.

-Pastries restore more food than the rations can.

-You will always land an attack if you lead an enemy into a doorway, even if they are one cell away from you, but the door cannot be burnt.

-If you are unsure whether a potion is safe or not, throw it against a wall. Most potions like poison or gas will reveal themselves if thrown and you'll always know when you get one from then on.

-Cursed items lose the curse if improved with a scroll.

-Anointing the Ankh with a full flask of water will make it more powerful.

-Enemies that are faster than you can hit you even if you move away from them.

-Yes, water can eliminate the effects of fire. Also, fire burns.

-All doors in a level can be accessed one way or another.