Kelly Coyne of Root Simple wrote about following the clothes-folding advice of Marie Kondo, author of The Life Changing Magic of Tidying Up.
Very simply, KonMari politely insists (while flicking her pink glitter cat o' nine tails) that we shape our all of our foldables into neat rectangular packets and stand them cheek-by-jowl in our drawers, rather like file folders in a standing file.
As someone who has always folded clothes into squarish shapes and stacked these squares vertically in drawers, this small change has made a lot of difference for me. You can fit more stuff in a drawer by stacking vertically, certainly, but it's hard to keep the drawers tidy, because you're always rooting through the stacks looking for things. You can try to be careful– heaven knows I've tried–but eventually the stacks topple and chaos ensues. This is especially true when your drawers are overcrowded to begin with.
When clothes are lined up vertically, like file folders, you can find what you're looking for at a glance, and remove it without disturbing the other garments. Your drawers remain tidy.