I too chuckled when i saw saran wrap. Other items - I bring not a power cord, but the outlet that has three plugs in it, to accommodate those extra needs (read: blender, or less exciting coffee maker, camera charger, etc.)
- camera charger
- smaller change - $5 or $10 (or larger if you like) to tip those folks in the beginning that you may need the services of. Especially cabin steward.