The team at Manager Tools/Career Tools did a great series on this topic. They go into the details of how to figure out what your market rate is, how to build your case, and how to present it.

http://www.manager-tools.com/2013/12/when-ask-a-pay-rise http://www.manager-tools.com/2014/04/how-ask-a-raise-researc... http://www.manager-tools.com/2014/04/how-ask-a-raise-cost-li... http://www.manager-tools.com/2014/05/how-ask-a-raise-making-...