Edward De Bono's thinking hats
WHITE HAT
Facts, Information, Research, What is Need, Data
BLUE HAT
Understanding, Managing, Controlling, Organizing
RED HAT
Feelings, Hunches, Intuition and Warmth
GREEN HAT
Feelings, Hunches, Intuition and Warmth
BLACK HAT
Logical, Negative, Skeptical, Critical
YELLOW HAT
Positive, Benefits