This document discusses three types of thinking: future thinking, past thinking, and present thinking. Future thinking involves imagining possibilities, past thinking involves recalling experiences to learn from them, and present thinking involves developing strategies for managing the present. While humans can conceive of all three types of thinking, individuals differ in how much they utilize each, which is referred to as their "mindtime thinking style." The document then provides more details about each type of thinking, including how they relate to perception, motivation, behavior, and potential resistances to environments that don't align with that style of thinking.