Flip-flops for the rocky beaches. Towel/sarong because those rocks get HOT! Hat and/or sunglasses.
Toiletries and Medical Supplies: SUNSCREEN!!!!
Photo Equipment: Lots of film, because the scenery is spectacular.
Camping/Beach/Outdoor Gear: Thermarest for sleeping on the rocky beaches. Tent & toilet paper for the campsites.
Clothing/Shoes/Weather Gear: The roads in Amalfi and in all the villages in the Amalfi Coast are cobblestoned. They are steep, narrow and winding. Wear a well padded pair of shoes for the long and arduous walks uphill. Slippers and sandals cannot provide a proper grip on the cobblestoned roads and can result in very sore feet.