[coroxout]

You've been downvoted but I laughed because this is exactly the inner monologue I have whenever I try to start a Dreaded Task.

"I don't know where to start! Well, I could start with document A, but then I'd need some information from document B, which requires document C, but I can't do C until I've done A -- oh no, a loop! I can't see how to get round this at all; maybe my head will be clearer tomorrow. Time for a break.

(NB the "loops" often aren't really 100% circular, but seem insurmountable in my head; this is the point where talking to someone is invaluable, if I can get past the usually correct suspicion I'm going to sound stupid for making a big deal about a block which seems totally trivial and non-blocking when I try to put it into words)

...Also, didn't I already work on document B? But I can't remember where I got to, or where I put my notes, or what they mean..."

I do suspect I might have AD(H)D but I live in a country where adult ADHD is not really recognised, so I guess I'll have to do the best I can using some of the good tips posted here instead.