Give your current salary number (including benefits package, bonuses, etc.) and then quickly move the conversation along about where you’d like your career and salary to go within this company.
When you are job searching or preparing for interviews, you should always know your salary worth and market value. Do some research on the averages and then the averages in your local areas as well.
When you are going to negotiate your salary offer, you also will need to prove your value. Besides what the market might be paying for this position, you need to show your successes and achievements.
When you first get an offer, you should be asking questions about the compensation they provided. That way, you have all the information you need to make a more informed decision or for your counter offer.