Use your vacuum cleaner to find tiny items you've lost, such as earrings. Just cover the end of a vacuum cleaner with a stocking or pantyhose, and start your search.
By folding shirts KonMari- or military-style and sandwiching (instead of stacking), you can fit more into each dresser drawer and have a better visual of what's inside.
Organize each matching sheet set by folding everything and storing it inside one of the pillowcases.
While using a clothes iron to straighten hair is an old trick, using a hair straightener on collars and that space between buttons also works