I played Age of Mythology for a year before I learned the Colossus can heal simply by eating wood or gold. I used to hate having to heal them slowly near a temple. I read the manual for Morrowind so I already knew this but I am amazed at all the people who never learned how to delete learned spells from their book. Thats important as the game goes on and you need to clean up crap. Of course with Oblivion you had categorized pages so it wasnt as important.