"Manners are of more importance than laws"
How well you succeed in getting a raise depends on your preparation, so mentally prepare yourself to address the issue by realizing that asking for a raise is a part of your career skill set. Managers handle these conversations as part of their job, and your boss expects you to initiate this conversation after you've been at the company for at least a year. Some companies don't initiate a yearly salary review, so, "if you don't ask, you don't get."
Asking for a raise can challenge your deeply held beliefs about money. Some people have a deep seated fear, or even an unconscious aversion to the subject of money. After all, conversation about money is one of our societal taboos.
Everybody Works for Money
If you find that you really don't like to talk about money, then work to develop a healthy attitude toward money and work. Check your attitude to find out why you are afraid of asking for a raise. Are you asking for a raise out of a sense of injustice? If so, this defensive attitude will come across to your boss. Your goal should be to look forward to asking for a raise! This is the one conversation that you should initiate with self confidence and a sense of what you're worth. Make sure you know the going rate for your job. Always remember that asking for a salary increase for great performance on the job is always going to be on you, and not your employer.