Once I saw that my fellow-bloggers were taking people to their desert island, my reaction was - in that case, please can I take Martin Sheen, Colin Firth, Hugh Jackman and Liam Neeson? No? Oh well, never mind!
Assuming that this island has electricity, then my computer would be my first priority plus several external hard drives for back-up in case the main hard drive died or got full with everything I'm going to write. I'm sure I could write several best-selling novels while I was marooned in Paradise.
Secondly, I'd take my pile of still-to-be-watched DVD's which I could play on my computer to give me inspiration in between my writing sessions. Oh and I'd also include my 7 seasons box-set of 'The West Wing' of course, since I don't mind how many times I watch those.
Next would have to be an inexhaustible supply of diet coke (little umbrellas optional) as I have to keep up my caffeine levels.
Last but not least, I'd have my own personal chef to cook me some wholesome meals. Nothing fancy, I eat to live, not live to eat, but I'd gladly let someone take over the cooking chore while I concentrate on more interesting things.