Simply amazing short video on how to fold your fitted sheets FLAT ... yes FLAT with the elastic and all.
Word for word from Real Simple website:
What You Need
- fitted sheet
- flat surface
Follow These Steps
Drape the sheet over your hands.
With the top two corners inside out and the elastic edge facing you, hold the fitted sheet with one hand in each of the top corners.
Fold in half and tuck in corners.
Fold the sheet in half vertically, flipping the right corner over the left to create a pocket. Turn the sheet 180 degrees and create a second pocket up top. (If your sheet has gathered sides, tuck them into each other.)
Fold in half again.
Readjust your hold so there are two corners over your left hand and the other two over your right, with the folded seam at the bottom and the tucked and gathered edge facing you. Fold the sheet in half once more so that all four fitted corners meet and flip the right set of corners over the left set.
Lay the sheet on the bed.
With the gathered edges facing up, fold the longer part of the curved edge in toward the center a few inches to create a straight edge. The sheet should now be a rectangle. Fold in half lengthwise, then fold into thirds.
Tip: To prevent wrinkles, fold sheets right out of the dryer while they’re still warm.