How do you pick which dates to mark first? I put a wall calendar up for bill due dates and it stopped so many late fees. Color-coding different payments made it even clearer. Turns out, our brains just need a visual map to chill out!
My friend was always chasing invoices until she got a cheap notebook. It's like what @bethhunt said, just seeing the dates laid out makes things feel manageable. She went from constant panic to having a clear plan for her money.