Over half of respondents to PayScale's survey said that they'd never negotiated salary in their current role. That's too bad, because 75 percent of those who did ask received some sort of pay increase. When it comes to raises, if you don't ask, you (probably) won't get.
Of course, asking for more money is uncomfortable. If you struggled during the recession, as many workers did, you might be reluctant to rock the boat. Even if you're willing to negotiate, it's hard to know where to start. How can you increase your chances of getting a pay raise — without making the boss mad?
It all comes down to data. Build your case based on research, not hearsay or appeals to emotion. Focus on what your skills and experience are worth to employers, and it'll be easier to negotiate for an appropriate salary.