I once heard a good suggestion for people suffering from depression/suicidal thoughts/self harm.
Make a “safety box” full of things that make you happy. Hide it somewhere and pull it out only when you are in extreme danger of doing something to yourself.
I’ve never made one for myself, even though I always thought it was a good idea. I would probably put old (happy) photos, old journals, letters from friends and oh yes… a bunch of chocolate bars in there. I’m just curious, what kind of stuff would you guys put?