Courtesy costs nothing. Lower the toilet seat after use. Let the people in the elevator exit before you enter. Return shopping carts to their designated areas. When you borrow something， return it better shape (filled up， cleaned) than when you got it.

"The best children's books are the ones that don't talk down to children."

成功不在于你赚了多少钱，而在于你对人们生活的影响。