There is something about the start of the packing process that gets to me. Maybe it is like writing the first word on a fresh sheet of paper. I've upgraded the size of my suitcase and decided to check luggage. I absolutely HATE the mad shuffle to find an overhead bin when everybody else on board is hurriedly doing the same thing. So maybe a big carry on with 'essentials'---- and check my bag and call it good. I'm flying out through O'Hare, never a thrill to zoom through trying to make a connection and carrying anything extra!
I figured if I spread the packing over a couple days and had the luxury of leaving my suitcase open in the guest room I'd be more leisurely about it and wouldn't forget anything.
Except my shower cap, I always forget that!