Under-$15 IKEA Finds That'll Effortlessly Organize Your Closet

It seems really unfair that we have seasonal wardrobes--tank tops in the summer, jackets and jeans in the winter--but we can't have seasonal closets. I don't know about you, but I feel like I need double the space just to stash my thick sweaters. I want to detach my normal closet from my apartment and tack on one twice its size.