Space saver bags will help you fit more in your backpack

I’d always been all about the packing cubes until I discovered vacuum-sealed versions of them! You throw your clothes in, seal the bag, then roll it up to push out all the air. I can literally fit twice as many clothes in my backpack when I use these! Even if you don’t want to carry more things in your bag, it frees up so much space that if you need to pack in a hurry, you can just chuck everything in.