Lay the fitted sheet flat with the elastic edges facing up
Tuck one corner into the opposite corner
Tuck the remaining two corners into each other
Hold the sheet so the corners are nested together
Lay the sheet on a flat surface
Fold the curved edges inward to form a rectangle
Smooth out wrinkles and straighten the edges
Fold the rectangle in half lengthwise
Fold again into the desired final size
Store the folded sheet neatly