"Never lose a pillowcase again! Here's how: If the clean set isn't going directly onto a bed, fold and stash it in one of the pillowcases to keep everything together". (Redbook)
I've shared this idea before, but the picture is so much nicer on Redbook's post! I've been storing my sheets like this for a few years now. I used to tie ribbons around sets of sheets a la Martha Stewart, but I love this idea so much more! You never have to wonder if the sheets match, especially if you have a bunch of white sheets, for example!
More on closets:
Ruthless Closet Purging - Getting Organized for a Move ... Or Not
Three Steps to Organizing Your Closet (ebook)
Three Steps to Organizing Your Closet (Kindle)