Focus! What makes you truly unique? What combination on knowledge, skills and abilities best represents you?
I've just finished reading Career Distinction by William Arruda and Kirsten Dixson. The book leads you through their process of assessing and defining your personal brand and shows you how to manage your brand from this point forward. It is full on great information and even has an online workbook you can access!
If you don't have it in you to read the book right now, at least visit their website www.reachpersonalbranding.com and poke around. There are lots of great articles and videos! This job search won't be your last. It is worth it for your to start investing in yourself and being true to your values.