I would add a couple more here. First, having a willingness to walk away from the deal, and a number or point to do so, is key in my experience. Second, don't

I would add a couple more here. First, having a willingness to walk away from the deal, and a number or point to do so, is key in my experience. Second, don't negotiate just because you think you should. I see this quite a bit with very young job seekers. They get an offer above their expectations and at or above perceived market rate, and they feel they need to negotiate just because they think they should always negotiate. Lastly, have a sense of timing when negotiating. Let the other side think about things for a bit. Tell the other side you want to give it thought and let them believe that you may walk away from a deal.