Rollup clothes: I learned this ticket from my friends in the military. Rolling up clothes takes up less space, and the clothes will have fewer wrinkles.
Put items in shoes: Shoes consume luggage space, so use them to store socks,
accessories, or anything else. Please put your things in a ziplock bag first for those with smelly feet.
How do you know if you have smelly feet?
If a crowded room suddenly clears out after you take off your shoes, go get that checked out bruh.
Bring shorts, short-sleeved shirts, and no-show socks: It's shocking how much space long-sleeved shirts and pants take up. Don't bring them to save space.
laundry detergent: Don't bring 50 clothing items for a 7-day trip. Instead, pack less and bring detergent. Department stores sell individual packets designed for travelers. You'll thank yourself later because you'll be more lightweight and mobile.
Bring less: I know this sounds obvious but try it once. You'll be surprised how little you need. But, of course,
the worst-case scenario is that you can always buy items when you land.