Don't just research your base

You already know information is key, and I want to stress that its so important to not only research your base salary, but also your bonus and any other pieces that are specific to your industry.

One study analyzed the starting salaries negotiated by men and women who were entering the workforce after earning their MBAs. On average, women accepted salaries that were 6 percent lower on average than those negotiated by the men. That is already pretty dramatic - but the annual bonuses negotiated was even more surprising: Women’s were 19 percent lower than men’s on average.