Start the game using the command line parameters listed below. Example ToEE.exe - nofog. To create a command line parameter make a shortcut to the game on your desktop and right click the shortcut to edit the properties. Where it loads the game just add the -mod or another option below:
You need a good cleric to do this one. Find somewhere you can rest for free, and set all of your cleric's first level spells to "Bless Water". Rest, and then cast your bless water as many times as possible. You can then sell your holy water as much as you want, and it is free to create more.
Earn Massive Experience
In the first village, Homlet, you stumble upon the first chest into the druid's house. With the rogue, a search finds a trap. When you try to disable the device and fail all of your characters get 252 experience points. Continue to your heart's desire. Also, you can hire an NPC and simply kill it. This works especially well when you hire any high level character.
Easy Armor
This trick works best for a level 2 or higher character. Enter the inn at Hommlet after dark, and speak with Tuperello. Agree to a drinking contest, and after everyone has passed out you can safely walk up and take all the items that they own. This will only work until you win the drinking contest, so make sure you get everything that you want.
Exploiting NPCs
You can easily exploit your NPCs by pooling (taking) all their gold. Do so, but leave one coin on each NPC or you may experience some difficulties. You can also claim more than your fair share of loot from defeated monsters. After the battle, do not investigate the bodies. Instead mark the spot on a map (or remember where the battle was) and head for town to rest for a few days. Head back to the site of the battle and you'll find the monsters' booty in an "item stack" (with no bodies). Take the stack and your NPCs will not lay claim to any of the monsters' dropped items.