Journaling For Self Improvement

If your read any self-help book or sign up for any self improvement program some form of journaling is always a key factor. Why is that? I was never one to keep a diary growing up but the more I learn about the benefits of journaling, maybe I should have. Journaling can help us with everything from achieving goals to building self-confidence, improving communication skills to reducing stress and anxiety. I don't think it really even matters how you journal, only that you do!