Stay wet, when slaked with water its much harder to be lit on fire or stained with sludge.

Water will dilute sludge, spray any toxic ground whenever you have extra water.

Flasks can be refilled. Be very careful not to fill dangerous flasks with other fluids as the particles will stagger in the air and hit you.

Burning enemies will often die if you slake them with water.

Your polymorphed form has its own, separate breath meter and HP depending on form (sheeps are 1 shot).

Enemies dying to eachother or the environment often drop double gold as long as you didn't cause it.

Loot often spawns with enemies nearby.

Head shots do extra damage.

Berserk also increases your damage and significantly increases explosion radius caused by you.

Bomb explosions stack, even TnT can be used to dig through rock with enough of them exploding.