To survive the Underworld for one you must have a light heart and have done good things in life. I don't think I would want to take out my heart and weigh it with a feather.(Read: What happens if your heart is heavier than a feather.) Another thing they needed was the Book of the Dead. The Book of the Dead
..consisted of spells that the deceased or dead would need to know to defeat the hard challenges on the was to Afterlife. The book was also used to rid off evil spirits. One other thing was extremely important...Creepy :$
The map of the Underworld and Afterlife printed on their coffins when they die. I wouln't want a map of a so called "bad" place on my coffin.!.!.!