I have a brand new character, we have only played once, but my totem item is central to his being.
Oddvar is a simpletonmonk with a very low intelligence. He depends heavily on the teachings of the masters to navigate the complex issues he encounters in everyday life. So I keep a small pocket copy of Tao De Ching on hand. It is uncanny how there always seems to be a passage or phrase handy to call on in any in game situation.
The simple, unarguable wisdom has been proven invaluable already, after just a single session.
I find myself carrying the book around with me at all times, cracking it open and reading a chapter or two. One even inspired me to create a monk feat.