The most challenging task for me (and the most crucial at the same time) was to find out ways of fighting suicidal thoughts. How to find a reason for living? Where shall I search for my motivation? I was prepared that my resignation notions would never fade or go away. At least, I successfully fought delusions about it.
Sometimes, I just need to let go. Retreat. Give up. I do it because mental health is more important than anything else. Besides, these so 'important' things at that moment usually turn out to be a noisy background only.