I'm guessing Honolulu (Waikiki Beach)? If you're not already tan, get a suntan! Otherwise you'll spend most of your time in your hotel room too burned to go out. Also, any supplies you wanna bring...cameras, film, binoculars (for the chicks on the beach...lol), etc. Pack it. There's no Walmarts anywhere around there...just lil stores called like ABC Stores (EVERYWHERE), but those lil stores are super-expensive. Other than that, bring plenty of cash. Oh yeah...if you plan on going to Hanauma Bay for snorkeling around the reef go buy your own disposable waterproof cameras BEFORE you go to Hawaii...it's fucking expensive to use their cameras, but cheap if you bring your own. And you'll see a ton of cool stuff down there.