Not going to overclaim anything here but getting outside regularly has genuinely helped my mood more than most things I've tried. The problem was consistency - I'd go for a week then stop because there was no real reason to do it today specifically.
What actually helped was making it competitive with a friend. Built a simple app called Outstep around that idea - friend groups competing weekly on outdoor time, plus a photo diary of what you find. Something to look back on.
Anyone else find being outside helps? And what keeps you consistent with it?