Real joy comes not from ease or riches or from the praise of men, but from doing something worthwhile.
(from the book "De Bono's Thinking Course" by Edward de Bono)
Imagine a glass of water on a table in front of you. Your task is now to empty the glass without breaking it or tipping it over..
How many solutions to you find? Think first yourself and write your ideas down, before you read on!