Assume the best first. You’ll be wrong sometimes, but you’ll be a lot less tired.

Assuming the worst feels like intelligence, as though you are the one nobody can fool. What it mainly does is cost you energy, because you are running a threat assessment on people who were just running late. Go generous and you will be wrong sometimes, and the price of being wrong that way is usually small and recoverable. The price of suspicion gets paid every single day, quietly.

When something ambiguous happens, take the kindest plausible explanation first and act on it. Keep your eyes open, and let a pattern change your mind rather than one moment. You will be less tired by Friday.