There were some helpful tips in this book, but overall I felt this philosophy was putting the cart before the horse. The message came across as, "You feel depressed because you think depressive thoughts." It was sort of invalidating, implying, "You caused your depression and did this to yourself by thinking negatively." Also, many of the tactics revolved around combating depressive thoughts such as, "I am going to feel this way forever." But I don't think that way, and so all the suggestions for countering those thoughts were not of use to me. I feel my depression is mostly due to chemical imbalances in the brain causing depressed mood, anhedonia, and fatigue, but I don't think that I will feel this way forever and that there is no help. But again, there were some useful tactics in this book, and there are probably many people for whom it is a better fit.