Do smile when you greet people. It is normal to see people in the tourist industry to greet visitors by placing their right hand over the left breast. It means “I greet you from my heart”.
Do dress neatly when entering places of worship. It is advisable for ladies, when entering places of worship to wear long sleeves and loose pants or long skirts.
Do remove your shoes when entering homes and places of worship.
Do point with the thumb of your right hand, fingers folded and not with the forefinger.
Do wait until you're in Malaysia to convert most of your currency. A special permit is needed to bring large amounts of ringgit (Malaysia's currency) into or out of the country. There are no restrictions for foreign money.
Do help preserve reef s and beaches by leaving coral and shells where you find them.
Do pay careful attention to your attire if you're female: Wearing hot pants and vests on the islands where Malaysians are used to foreigners is fine, but it may invite harassment elsewhere. At mainland beaches, bring a wrap-around as well as a swimsuit so you won't feel conspicuous; Malay women usually go swimming fully dressed and some keep their scarves on. While you wouldn't be expected to do the same, it's best not to draw attention.