Always stay up-to-date on the exchange rate and carry a calculator. It's easy to assume everything will be inexpensive when US$1 is the equivalent of JA$71.30 (27 Oct 07), but you'll want to avoid paying US$9 for a bottle of imported shampoo. Buy products made on the island. They are cheaper and you are supporting the local economy.

Prices are usually higher in tourist areas like Negril and Ocho Rios. Shops in "tourist traps" usually have higher prices than native ones, and you'll see the same items on offer in them.