I would take nothing!Id love to test myself and survive with what nature will give me.But if so i would take a knife,a camera and a picture of the people i love!
Assuming that this island is nice looking, I would bring
1) A construction crew 2) Supplies to build a mansion 3) A genie
With the construction crew and materials I could build beachfront property, and my three wishes would be loyal servants, all of the food that I could possibly want and imagine, and three more wishes
1. a lightsaber 2. a water desalinator 3. a cornucopia
I'd make drinking water out of seawater with the desalinator, I'd have enough food thanks to the cornucopia, and the lightsaber would have multiple uses, like cutting wood, heating/melting/engraving things, hunting, defence.
On a more serious note:
1. my trusty swiss knife that looks more or less like that: 2. a first aid kit 3. a lighter that consists of a magnesian steel bar. It almost doesn't use up and isn't required to be dry:
I would bring a lighter, clothes (that most people forgot) and a first aid kit. Or iPhone, bathing suit, sun block U see, u failed to say what island we r on, and the second list is a survival pack for the hawian island
I would bring a 1 billion dollar check. A suitcase for my 1 billion dollar check. And the batplane. I'm pretty sure that it has an autopilot feature so I'll be fine.
If for some crazy reason I wanted to stay on a island without civilization I would bring a that magnesium lighter thing on the first page, a girl, and a hachet. If I could replace the hachet with a miltary base I definitly would.