This document discusses different types of thinking, including lateral thinking, vertical thinking, emotional intelligence, and the six hats of thinking model. It introduces Edward de Bono's six thinking hats framework, where each hat represents a type of thinking - such as white for facts, red for emotions, black for caution, yellow for positive aspects, green for creativity, and blue for process. The six hats approach allows people to separate thinking into distinct roles and focus on one type of thinking at a time to make effective decisions.