Business
Singaporeans are punctual, so show up on time. The standard greeting is a firm handshake. However, conservative Muslims avoid touching the opposite sex, so a man meeting a Malay woman should let her offer her hand first and a woman meeting a Malay man should wait for him to offer his hand. If they opt to place their hand on the heart and bow slightly instead, just follow suit. Singaporeans generally do not hug, especially if it is someone they have just met, and doing so would probably make your host feel awkward, though the other person will probably be too polite to say anything as saving face is a major Asian value.
For men, standard business attire is a long-sleeved shirt and a tie, although the tie is often omitted, the shirt's collar button opened instead. Jackets are rarely worn because it is too hot most of the time. Women usually wear Western business attire, but a few prefer Malay-style kebaya and sarong.
Business cards are always exchanged when people meet for business for the first time: hold yours with both hands by the top corners, so the text faces the recipient, while simultaneously receiving theirs. (This sounds more complicated than it is.) Study the cards you receive and feel free to ask questions; when you are finished, place them on the table in front of you, not in a shirt pocket or wallet, and do not write on them or otherwise show disrespect.
Business gifts are generally frowned on as they smell of bribery. Small talk and bringing up the subject indirectly are neither necessary nor expected. Most meetings get straight down to business.