The following tips are courtesy of the Tourism Malaysia website, located at www.tourism.gov.my

• Although handshakes are generally acceptable for both men and women, some Muslim ladies may acknowledge introductions to gentlemen by merely nodding and smiling. A handshake should only be initiated by ladies.
  
• The traditional greeting, or salam, resembles a handshake with both hands but without the grasp. The man offers both hands, lightly touches his friend's outstretched hands, and then brings his hands to his chest to mean, "I greet you from my heart.” The visitor should reciprocate with the same gesture.
  
• Always call ahead when visiting a home, and always remove your shoes before entering.
  
• Use your right hand when eating or offering gifts. Don’t point with you index finger, either, but use your thumb and a closed fist.
• The shoe rule applies to mosques and other holy places, and women should cover their heads and bare shoulders. Long skirts or pants for women are advised.
• People in the tourism industry are probably used to it, but toasting, especially with alcoholic beverages, is not common.