Although seemingly sleepy, there is still plenty to do on Koh Samet, especially in the evening when the beach bars come alive and there is loud music, drinking and dancing on the beach, especially on weekends or around the full moon.
Located in Rayong Province, the island is reached by a short ferry ride from the pretty port town of Bang Phe. Bang Phe itself can be reached in 2-3 hours from Bangkok's Ekkamai bus terminal.
A good way to see all of the island's pristine beaches is to hire a motorbike, whilst songthaews will take you just about anywhere you want to go. Another great option is to take a boat tour around the island. Boat tours can usually be combined with snorkelling or scuba diving trips.
The island largely consists of jungle in the center, and another great way to explore is to go hiking, while you can watch the sunset from dramatic cliff side locations along the south-west coastline.
There are evening fire shows at a few of the islands beach bars. They are usually held after 8 pm and act as a showcase for some of the talented locals. While on Koh Samet you can learn a new skill and show off to people back home by taking fire juggling lessons from one of the experienced fire jugglers.
Yoga classes are held daily at Ao Pay beach and the yoga teacher has been practicing yoga for more than thirty years. You can also ease aching muscles with one of many types of massages on offer.
Food wise, the island is famous for seafood, and some of the best barbeques are found along Ao Phai and Haat Sai Kaew beaches. However, you can also find just about any style of food that takes your fancy, from curries to pizza.
Many of the bars show movies and football in the evening and a good way to escape the heat in the middle of the day and chill out is to order a coconut shake and tune in to a cheesy western movie.