Quite a few of these are bang on but (maybe its because its before lunch) the food-related ones really resonate with me!
"Take enough food and drink with you"
I've hit the wall once and vowed never again!
"You can eat SO much more after a ride than you ever thought possible"
Touring got expensive for me because I was having breakfast, two lunches and 3 course dinners every day =D! The hunger...