5. Keep Papers in a Folder
There's nothing worse than having billions of loose papers in your bag, which end up folded, crinkled and worn from being carelessly shoved in your bag. We've all been there, right?
Make it easy for yourself and buy a cheap, clear folder which you can slide papers inside. Once you've done that, lean it up against the side of your bag, sideways so it's horizontal.
Similar to the book idea, it will help you save room by keeping the tall things leaned up against the sides and won't cover smaller items such as make up and your set of keys.