Too many people base their salary negotiation on their last job or their monthly expenses or a random number that sounds good to them. Don’t do that! The internet makes researching salaries easier than ever. Research two to three salary websites printing out the information. Bring that to the negotiation table with you. When you can show why you are asking for the dollars you want it is much harder to be turned down.
Some of my favorite websites are LinkedIn Premium, Salary.com and Glassdoor.com. If you belong to a professional association they will often have industry-specific information available as well.
See the complete article here.