Absolutely, I can check all of those boxes. The worst one is #4 for me, because when I work on task A I realize that I am not working on task B, C, or D. Of course it is somehow less bad to work on nothing rather than favor one task over the other :-). That said, there are many techiques for pulling through these issues. For #4 I set a timer and plan to work on task A for only 1 hour or what ever, and give myself permission to work on something else in hour 2 etc. But at the same time if I feel bad I'm not working on other tasks I know that I'll have used up my time for this task soon enough.

Self inflicted mind games to be sure but they can be helpful.