Here's a tip that I'll pass along to you for free, because we're friends, and I don't want people to associate us with you if you're acting like a fool on the island ;-)
Always Say Good Morning or Good Afternoon.
Simple as that!
Greetings are very important in the Virgin Islands - say "good morning", "good afternoon" or "good evening" to store clerks, bartenders or even taxi drivers, and you will receive better service!