Two for one: shoes and boxes
Two things which can really clutter up a house are used cardboard boxes and piles of shoes. A simple way to solve both of these problems at once is to use the cardboard box as a shoe organizer. Grab a tall cardboard box, make some simple cardboard cutouts which can fit one shoe in each one, and slip those shoes right in.
This is an easy way to keep your shoes out of the way. Not only that, but if you, like many of us, have a large collection of shoes for every occasion, this provides an easy way to store them: simply stack the boxes in your closet!