I carry a card with all waist, length, bust measurements of my family members.
I carry one of those free paper tape measures from Home Depot or other store (Ikea also has them) to take measurements of garments because you can never rely on size since many items have ‘shrunk’ or stretched from their original size.
I carry a list of specific items I’m looking for so I’m not ‘dragged away’ or overwhelmed by all that’s there. I know what I’m looking for (say, a black blazer for my daughter) and that’s ALL I look at. It’s tough but it saves a lot of time and frustration.
If shopping for myself, I wear a tank top so I can try on sweaters, blouses, etc. without having to go to a dressing room (and some stores don’t have a dressing room.)
I keep a pair of ‘peds’ so if I’m trying on sandals, I am protecting my feet!