The document provides tips on positive thinking from an article by Dr. Charles. It suggests that positive thinking can lead to longer life and better health, while pessimism has negative effects. It offers four tips for developing positive thinking: 1) Stop negative thoughts and find positive distractions instead, 2) Don't compare yourself to others, appreciate what you have, 3) Write down negative thoughts to clear your mind or note positive events to feel better, 4) Use positive language when speaking to encourage positive thinking.