Best would have to be sleep and faith. I used to have horrible, horrible unrelenting depressions. I would be suicidal 24-7 and was hospitalized many times in my 20's. Don't know how I would have gotten through it without my faith in God. I don't know how people do who don't.
Sleep is a wonderful help for the hypomanic part of my illness and also the depressive. I know exercise is good, too, but I haven't taken it to the next level yet.
Not helpful to me is group therapy. Had to do it in the hospital and hated it when the group was not run well.
Best ~ talk therapy Worst ~ being forced to run and jump on a giant inflated ball in occupational therapy during one stay in an adolescent (juvenile) psych ward
The best therapy was for me intensive group therapy in outpatient hospital. Learned how to deal with and forgive myself for lots of stuff.
Absolute worst was hypnotherapy. We would bring things up under hypnosis, then never talk about them or do anything to resolve and it totally made me worse! I left feeling fragile and vulnerable. I would have awful dreams and my depression compounded!