The best way to pack a backpack
Here it is. No gimmicks and no things to buy (unless you don’t have a suitcase opening backpack). And it works, because this is how I packed it when we left Poland and it is in pretty much the same condition now.
The worst part of living off a backpack is that when you need to find that particular top/pants/something you end up digging around and messing everything up. Or at least I do. This way of packing ensures quick access to everything and best of all, that you don’t forget about the clothes at the very bottom, which you end up carrying around, but never wearing.