I also noticed two things:

1. Positive emotional reaction to something in the world that is in connection with what I'd like / "dream" about, as long as this reaction feels "real enough", it can suddenly clear all focus issues and then I'm able to do the task like I'm my old (still mentally healthy) self.

2. In general, if I can make myself feel the world is "real enough" (and without getting a bad reaction to focusing on the outside world), it increases my chances to get focus.

I don't know if that makes sense to anyone about these being "real enough"...??