There are a lot of studies about the effects of gratitude. People who practice gratitude have a more positive outlook for the future and they complain of less physical ailments. It impacts the body as well as the mind. You should use a separate journal or notebook and write down three things that you are grateful for or that brought you joy. It is a great way to end your day. Doing this consistently engenders a habit of looking for the good. And on those bad days—we all have them—you can pick up this book and look at the good in your life. It’s documented!