Negotiation requires gathering information, planning your approach, considering different alternatives and viewpoints, communicating clearly and specifically, and making decisions to reach your goal. According to Wegerbauer, understanding your strengths and resources, being able to respond to the needs of the other party, and knowing your competition enables you to assess your bargaining position more accurately. Learn the power factors. Relative power, Wegerbauer says, is a function of the following. In the planning step, get as much information as you can up front and then map your skills against what the company values, using both the company's written and unwritten signals.
Timing is also important.
Remember that the best time to negotiate is after a serious job offer has been made and before you have accepted it. Once you are clear about the initial offer, you can express interest and even enthusiasm, but ask for more time to consider the job offer. The key message here is not to make an impulsive decision. If they really want you, there's time. Negotiate for a win-win .