I spent 30 minutes buzzing around from area to area, not getting anything accomplished. Time to take a breath and regroup.
My new favorite mantras:
I can do anything, I just can't do everything.
I can do everything, just not all at once.
Blather. Cleanse. Repeat.
(Talk through the frustration. Take a breath or walk away for a minute. Get back at it.)
Perfection is a myth. Stop at good enough and move on.