After killing a monster worth high points (like a dragon), cast paralyze on the dead body to bring back to life and kill again with one blow to get the points again. Repeat as needed.
Free Money
After you retreive the book of Divine Intervention go to Harmondale and sell it. Then go to the arbiter and click on "I lost it" he will give you another one. Go outside and drop it, then go back inside. Repeat this process of getting the book and dropping it outside then getting another one. After a while pick up all the books and sell all except 1 so you can complete the quest (works best with grandmaster merchant).
Receiving More Items from Dead Dragons
You can have as many items as you wish after killing the red dragon in the beginning of the game. Just click on the dead red dragon to get your item and if you see that the red dragon still appears save your game. Click on the dragon again after saving. If clicking on the dragon & it disappeared, reload your save game & click on the dragon again. Do it as many times as you like til you're ready to go for the fight.
Red Potion In Treasure Hunt
You will find a potion bottle in a crate and a red berry to make the potion in another crate. The crate with the potion bottle is near where you started and the red berry crate is in the west side of the island.
The Hat In The Treasure Hunt
Talk to town citizens. One of them will try to sell you the hat.
Easy Experience...