If i may continue..

Hello class!

As you all know, I ran out of time during my group's peer teaching session earlier today. Since we'll be having mock job interviews next week and like I said, non-verbal communication accounts for 90% of what you are trying to convey in your job interview, I feel that is quite a disservice to you that I did not manage to cover what I had intended. So here are a few pointers picking up from where I left off. This is a long post but I hope you'll find it useful!

In the hot seat
Politeness
-don't yawn
-don't keep glancing at your watch
-switch off your cellphone
-do not interrupt the interviewer

Eye contact
-in a panel interview, establish eye contact with the interviewer that posed the question and when you're done delivering your answer, establish eye contact with the rest of the panel
-looking down is only acceptable when taking notes

Posture
-enter the interview room with your head up and walk in a self-assured manner (indicates confidence)
-sit down with your legs crossed at your ankles or feet placed flatly on the ground (indicates professionalism)
-sit up straight and slightly leaned forward (indicates attentiveness and interest)
-sit on front portion of the chair, but not on the edge
-do not slouch (indicates sloppy work ethic, carelessness, low energy)
-the further up you cross your legs, the more defensive you appear
-refrain from raising on leg/ankle on the other leg (appears casual or even arrogant)
-refrain from placing your feet to far apart or stretching your feet too far in front of you (appears casual)

Gestures
-limit your gestures (otherwise, appears unprofessional and dramatic)
-body language experts say that the less your hands are waving around, the more confident and in control you are
-refrain from crossing arms (indicates negative attitude, closed personality, defensivesness, even aggressiveness)
-arms should be loosely placed with hands clasped loosely on your lap or the table
-smile and nod when appropriate (keep the smiling under control if the interviewer appears very no-nonsense and serious)
-if interviewer says something amusing, it is appropriate to laugh only if interviewer laughs first

-do not fidget
-refrain from touching face or hair (indicates discomfort and is very distracting and unprofessional)

Mannerisms

-know your nervous ticks and suppress them (e.g. twirling hair, shaking leg, clearing throat, picking nails etc.) or you will appear awkward and nervous
-interviewers will expect you to be nervous but make sure that when you are answering questions, try to keep your nerves under control so as not to take away from the strength of your answer

Voice-adopt a clear, controlled voice delivery
-refrain from being monotonous (appears unexciting)
-instead, vary your tone and pitch (appear engaging) but do not overdo it!
-when posed a question, breathe (always a good idea), pause (as mentioned by Titus) and react.
-you should act as if you are an equal to the interviewer, not a subordinate. consequentially, do not take on an apologetic or defensive tone during any part of your interview

Read the interviewer's body language
That's right. Turn the tables to help you determine how to gear your response.
-hand fiddling, loss of eye contact are signs of boredom. wrap up what you have to say and ask the interviewer if they require further details
-finger drumming or rubbing one's face indicates irritation. bring your point home and clarify that you are indeed answering the question.
-crossing arms or leaning away shows the interviewer is uncomfortable. perhaps you are invading his/her space. shift yourself to create more space between the two of you.

Lastly,
PIE! - Poise Interest Expressiveness

Poise: appear confident, comfortable, in control of yourself, in control of your nerves and attentive

Interest: exude interest in the job, the company, the interviewer by establishing eye contact, refraining from behaviour that makes you look disinterested and maintaining good posture

Expressiveness: demonstrate high positive energy by being enthusiastic, smiling and emoting (not excessively though!) your answers. however, refrain from expressing negative emotions (scowling, or frowning) when bringing up negative things.