“To keep feeling better in life, we need to have an internal commitment to choosing better thoughts,” Diana explains. “Starting with one positive thought leads to a positive inner dialogue, and that ultimately leads to feeling good. Positive thoughts bring good feelings. The key is conjuring enough positive thoughts consistently — letting one lead into another to form positive thought chains — to sustain a better feeling.” Here are Diana’s five steps to creating positive thought chains: “The purpose of this exercise is to help you learn to stay in positive thought for as long as possible,” she says.   Step 1: Write down five aspects of your life that…