H1B, H4 Visa

At first BIG thanks to this forum who helps individuals on a regular basis. It's a great help to all by virtually knowing the atmosphere prior to that when one actually go for the interview.
Had attended visa interview this week. Both OFC and Consular have very systematic process and there are very less chances of getting late from the scheduled time.

@OFC: just carry the original passport, visa appointment confirmation and DS-160 confirmation
They'll take finger prints and photograph. And, confirm your attendance by providing stamp on DS-160 confirmation page. Carry all these on next day (specially same stamped DS-160 confirmation)

@Consulate:
brief about the questions:
- how long you have been with current company
- project nature
- client name and location
- marital status
that's all and the golden words finally!!!

basic rules to follow (as per the experience and observations):
Professional attire - does most of the job - well begun half done :-)
Eye contact and smiling face
Have presence of mind with good listening skills (better to response with slight pause rather than answering wrong)
Try to keep the answers crisp (to-the-point) and don't invite more questions out of the answers given (try to keep your level best to have questions as close-ended only)

Hope this helps. All the best to all who would be attending it in future.