Natural colours and textures reminiscent of the beach (like sand and driftwood) can be incorporated into the scheme through your choice of flooring. Furniture is another way to bring in island-style textures and colours - try adding pieces in rattan or wicker and mix and match with plain wood furniture for a relaxed, informal feel.
Next add colour - and be bold about it! Think sun-baked brights from Caribbean carnivals and beach house décor when painting your walls - a sunny yellow or chalky turquoise blue would be a good choice.
Finally, go to town with your accessories. Lush green foliage really help this look to work. Finish off the look with coastal accessories - a toy sailing ship, hurricane lamp or even a hammock will really help to pull everything together. Now all you need to do is to pour yourself a cocktail... and relax!