I try to put pockets in my dresses whenever possible. It’s nice to be able to leave the house without a purse sometimes and to have somewhere to put my hands when I’m feeling awkward (which is most of the time), and pockets are very easy to put in.
Before you sew up the side seams of your skirt, cut out four pocket shaped pieces (see the picture bellow if you’re not sure what this shape should be). Make sure the opening is large enough to fit your hand. Measure down 6 inches from the top of your skirt (or however far down you want the pockets to be) and place the opening of the pocket along the edge of the skirt piece with the right sides of the fabric facing each other. Make sure the pocket is angled down. Sew the pocket to the skirt along the edge that will become the opening of the pocket. Repeat with the other side of the pocket.
Turn the pocket pieces so they’re sticking out the sides of the skirt and press flat. Put the front and back of the skirt together so the two parts of the pocket line up. Sew down the side seam to the pocket, then around the edge of the pocket, and down the rest of the side seam below the pocket.