You will need to take...

Passport; Non EU country,

Sun glasses; it's very bright,

Sunscreen; it's very sunny,

Soled shoes; for walking off road,

Turkish Lira; most places take £ pounds, but a few YTL is a good idea,

Debit card; Chip and PIN, is the easiest way to pay at Supermarkets, Eating out and Garages

Toiletries; just what you would use at home,

Drivers Licence; if you are hiring a vehicle,

Mobile phone; very few land lines outside of major towns, you need to confirm your return flight.

Swimming stuff; costume, snorkel, mask, flippers, in-water shoes for standing on rocks,

Hat; The sun is very hot when overhead,

Books to read; its your choice! But we recommend you take some,

Alarm clock: sleeping can come easily, and sleeping late easier, especially if you have a plane to catch,

Sandals, you're on holiday after all,

and whatever else you personally want.