There is no rough guide which can tell you what to bring exactly. In Thailand you can buy anything
that you may need to enjoy your stay. It is worth bringing some medical supplies such as sterilised needles in case you
need some emergency treatment (see the www.mdtravelhealth.com website for more information).
If you are planning a to stay in Thailand as part of a longer journey then it is best to buy what you
need when you arrive as trekking in the mountains with everything you need for a beach holiday does not make for the most pleasant experience.
If you like shopping then it's something to add to experience when you arrive. There are a list of interesting shops to be found on Koh Pha Ngan in the Shopping Guide section. If you are only staying for a week lying on the beach, then maybe
bring everything you need so that you make the most of the time you have to relax!