There is no street lighting, so remember to bring a flashlight for when you leave during the evening.
If you fear insect bites, get a good insect repellent.
Make sure you bring cash,
credit cards are not accepted everywhere (so is the case of Villa Eglantine).
There is no money distributor on the island.
Swimming shoes may protect your feet when you enter into the sea near to the rocks.
Use walking shoes for your promenades in the nature reserve.
Also, protect yourself against sunburn.