Hey @beautychicks!
Others have already given very useful advice.
The important thing, in my opinion, that I would want to add is that you must consider whether you are a good fit for the job you're being interviewed for.
This may sound really commonsense and a no-brainer, but many times one's suitability for a particular job is sidelined due to other factors. Maybe the pay is good and the benefits are alluring. Maybe everyone is saying how you've gotten hold of a golden opportunity and should not let it pass. But even if it's "a dream job", if it doesn't fit or is not suitable or you, please carefully consider. (E.g. If you hate numbers, don't be an investment banker just for the money or prestige.)
This is a very personal question that each one has to ascertain for himself or herself. What may suit someone else may not suit you. It will not be sustainable in the long run, nor conducive to your overall satisfaction and well-being.
All the best! (: