I mean this depends on where you’re going and for how long… in general this is how I pack, carry on suitcase I got it down to a science
I give my self 2 medium sized packing cubes , one is for tops and dresses and a jacket, the other is for bottoms and skirts, 2 zip bags one for underwear ( 1 pair for each day) and bras ( 1 for each week ) and...... reply
Snacks? That's the first thing that cane to my mind tbh. I assume you're going to a tourist spot, the food there are usually expensive.
And pads/tampons, just in case you got your period if you're a girl. reply