Simple Etiquette
Cultural etiquette has been described as the unspoken but assumed behavior that conveys politeness. Therefore it is important that you take the time to learn about and follow "local etiquette". In Indonesia, there are a few specific rules that visitors should be sure to know about and follow.

Never hand anything to an Indonesian with your left hand. As in most Islamic countries the left hand is considered "unclean" and thus insulting. If this makes the action somewhat cumbersome by having to change hands, take the time to do it anyway. Handshaking is customary for both men and women on introduction and greeting. Indonesians will frequently touch one or both hands to their chest after shaking hands as a sign of sincerity.

There are a few differences in the use of hands and feet for indicating actions or getting attention. The proper way to summon someone is to use one of the Indonesian words Pak, Mas, (for men) and Bu, Mbak (for women) and make a scooping motion toward you with your hand, fingers facing down. Crooking the index finger as is common in the West is not polite here.

Also, be aware of where & how you position your feet. Exposing the sole of your shoe is considered impolite as is pointing with your foot to indicate an object. Shoes should be removed when entering mosques or, usually, when entering someone's home. If you are unsure, ask.

Be aware that emotional displays of any emotion are considered rude.

Women should avoid wearing halter tops or shorts as well as tight fitting or revealing clothes in public.

Lastly, visitors should keep in mind the importance of status in Indonesian society. In Indonesia everyone has status, but that status is situational. A street vendor or cab driver may have very high status in his home community either through leadership ability or religious training. Try to understand the different situations that arise in day to day activity and modify your personal behavior to meet those situations appropriately.