Protect yourself from the sun
Like any tropical location, sun protection is a must. The sun can be very strong and protecting yourself from sun damage is important. I would recommend that you bring your own sun protection with you allowing you to have the brand/spf you desire. If you plan to do any water activities, I would recommend that you invest in a water resistant brand that will last. You can also purchase all sorts of sun protection at the ABC stores, but you may pay more than back home. I usually carry my brand/spf of choice, this way I don't have to worry about settling for something I do not like.