A few more suggestions:

aluminum foil -- comes in handy

extra reading glasses -- the locals love 'em as parting gifts

juicy novel -- never know when you re going to be stuck in airport

baby powder -- hits the spot after day in the sand n sun

lots of socks -- if you run out, they're hard to find in Negril -- and expensive

printed-out hotel confirmation -- otherwise u could be on the street!

big pool towel -- if you go budget hotel, towels are motel 6 size

scissors ....