This comes from Richard O’ Connor, Ph.D. , author of Happy at Last. This exercise has been shown to increase feelings of happiness and decrease feelings of depression.
Each night before going to bed, think (or write down) three good things that happened that day. They can be small or large, anything that made you smile or feel good. For each item, answer the question, “Why did this thing happen?”
That’s it. Pretty simple! But it does work. This is one that I’ve tried.