Place a coat rack directly next to the door on the right. When the door opens, the coat rack is covered; when the door is closed, the coat rack is easily accessible. While you may not have the room to place a closet in a shallow entryway, that unused corner gives you an excellent place to hang coats.
Hang a wooden board studded with pegs on the wall next to the door. The flat profile of a set of wooden pegs allows it to take up a small footprint in your shallow entryway while still giving you a place to set outerwear.
Install a set of narrow shelves next to the door to give people a place to leave hats, gloves and scarves as they enter. Give the shelves a festive look by decorating them for the season. Keep the shelves narrow so they don't feel overwhelming as you walk in.
Hang a wall shoe organizer to one wall. While this isn't an elegant solution, it keeps a scramble of shoes from developing in the doorway. Choose an organizer with a color that matches the rest of your home.
Place a corner shelving unit in one of the empty corners of your entryway. A corner shelf fits snugly into the juncture of two walls while providing a place to set things as well as store things long-term.