These things definitely help, but the question is how do you get someone started with all of it. It all seems pointless to do for someone with depression.
You can remind people that are choosing to be depressed, when they choose not to begin doing thing things to build the momentum needed to not be depressed.
They may be angry. This is ok, since anger is a step towards feeling the full range emotion which is needed to heal. Anger can lead to greif which can lead to sadness which can lead to joy and gratitude.
Depression is about repression or supression of feeling, not feeling the "wrong things".