I don't know how interviews are conducted in Singapore( since I
don't live there), but if it helps, show them a genuine smile and
don't be nervous and be polite and don't use swear words and never
say anything negative about your old company/boss even if they
sucked. Do a research on your new prospective employer and mention
to the interviewer that you went online or something to find out
info on the company. That hopefully should impress them, shows that
you are really interested in the job/company.
take a copy of your C.V with you along with any other
qualifications etc. also take names and addresses of
References.
never interrupt the interviewer when he/she is explaining something
to you. wait for them to finish .
always try and keep eye contact, offer a firm handshake.
before you go for your interview , write down questions you may
want to ask them and also be prepared for questions they might ask
you.
Be friendly.
dont eat or drink during an interview, unless they ask you if you
want something . no chewing gum too .
Always dress smartly, make sure fingernails are clean or cut or
both