Worst I've forgotten so far is a hair brush.

I keep the phone, wallet, id card, etc, in a ziplock. It gets packed the night before. Same with the towel and washcloth. Shampoo and such is in another ziplock.

Socks, shoes, underwear, belt get packed the night before as well.

When I get up I roll up the pants and shirt and pack them and away I go.

If I tried to do all this in the morning I would always be forgetting something.