This document provides tips for staying positive in a tough work environment. It discusses negative behaviors exhibited by coworkers like complainers, backstabbers, and gossipers. It also discusses theories of determinism and how past experiences and upbringing can influence one's outlook. The document recommends developing bulletproof self-change by changing one's thinking, attitude, and behavior. Specifically, it advises taking responsibility for oneself, observing situations logically, and adding positive behaviors like compliments and empathy to influence one's environment.