I've done one of these somewhat recently, but I thought I'd do an update in my attempts to stop overpacking...
Below is a photo is of my filled backpack, but here's a list of what's inside:

iPhone & charger
Passport & printed tickets
Laptop
GoPro
Outfit for when I land - black jeans, white top, belt
Blanket
Liquids bag - foundation, concealer, toothpaste, perfume, moisturiser, lip balm
Other makeup - toothbrush, makeup brushes, powder, another lip balm
Gum
Tissues, hand sanitizer wipes, make up remover wipes
Glasses and sunglasses
Headphones
Empty water bottle (to fill after I go through security)