Important life tip. Or, if your life isn’t full of drama queens, then at least it’s an important work tip.
Save the receipts. Save all the receipts.
Not shopping receipts… the receipts the kids talk about. The screenshots of things where people say something that you need to remind them of four months later when they act like they said the complete opposite thing. Those receipts.
Having a long memory helps, so you can remember you even have the receipts in the first place.