Depression doesn't have a cure-all, and people who are depressed don't need bootstraps. If these "strategies" work for you, count yourself lucky, and stop being patronizing to those whose bodies or brains are wired differently.

I've been depressed, and have been able through diet/exercise/supplements, to "pull myself out of it", but I have also had depressive episodes where I was in a fog like state for months, and couldn't really say or know what was wrong with me until it passed.

I count myself lucky, that I can notice the signs of the beginnings of deeper/darker depression in myself. That doesn't qualify me to preach to others.