Your suggestions are not inherently unreasonable but most of them amount to ways that a out-of-sorts normal person can make themselves feel quite a bit better,

Your suggestions are not inherently unreasonable but most of them amount to ways that a out-of-sorts normal person can make themselves feel quite a bit better, and have very little to do with steps that might help someone with severe clinical depression. That long list of things might help someone (especially given "drink mostly water" tends to suggest "don't drink very much alcohol") but it's unlikely to contain anything particularly first-order for a genuinely depressed person, and some of the "don't think too much about your health" suggestions seem actively mischievous. I've known a couple teetotalling regular-schedule folks with great exercise habits etc. etc. who have carried out their praiseworthy and abstemious schedules right up to they moment they stepped off a building or bridge, in one case leaving behind a couple small kids.