Lay out your pillowcase. Fold up the bottom edge 8". Top stitch along the folded edge at 1/4". (The stitched edge will become the top edge of the pockets.)
Turn the pillowcase over and fold the bottom up another 8". There will be 3 layers of pillowcase.
Pin the layers together and top stitch around the sides and bottom edges. Mark a line down the middle of the front pocket, pin and stitch.
Lay about 60" of 1" wide ribbon across the top edge of the apron centering it on the length of the ribbon. Pin in place. Topstitch ribbon at the top edge, bottom edge and across ribbon at sides of apron.
Tie it on, use it, put stuff in the pockets, look cute...you know the drill. :)