Do your research
How's your company doing? Has revenue increased, plateaued, or decreased? How is your company performing in the stock market? Take the pulse of your company before you ask for a raise, advises Kim Parkhill, technical recruiter at IT staffing firm Mondo. "These are all factors that can benefit the conversation you have with your boss."
Something else to consider: where you stack up compared to others in your role, industry, and location. Compare your salary on sites such as Glassdoor.com and Salary.com, Parkhill says, or check out the latest data from InformationWeek's 2014 IT Salary Survey. These resources will give you a foundation for your salary expectations.