Several different pairs of shoes, moleskin, bandaids, ibuprofin, sunscreen, discount cards (AAA, FAN, etc.), paper and pen to take notes for trip reports, calling cards.
On our next trip I'm going to take my blender and my own tequila and make my own margaritas in the room. I have a couple of sourviner HRH glasses from last trip. That will save me a little money. I can mix drinks while everyone is getting ready for the pool in the evening.