As you get further along in your career and you understand your strengths better–it is a good idea to start to refine your skills. That means–to truly analyze your skillsets and expertise in order to fully ultilze what you are good at in order to develop your specialization and thus your earning potential!
There are an array of tests that can show how you can better develop and refine your skills. Look to other professionals and see how they have hone their skillsets in order to make them contenders in the marketplace. You have many resources to become a better professional–utilize Google and find out how!