ah, tks for the tips there..
ah... one last impt thing...
Just try to go thru in ur mind some conversation question they
might ask...
And still there are some ppl who does this... Dont shift
around/fidget or go "ehhhhhh" when they ask a question and u are
suddenly stunned by the question... If u need slightly more time to
think of an answer, just repeat the question to them or ask them to
repeat 
, "Sorry, are you asking
about ......?" or "Sorry, can you repeat the question?"
Well, when faced with a question, human eyes will roll to a
specific position... mainly top right, middle right, bottom right
and the 3 left side... Each of them reflects something, as whether
u are recalling a scene/answer, or whether u are fabricating a
scene/answer... However I think most interviewier arent trained in
this aspect
