One of the best things you can do as a musician is to play for others. Add playing for professionals who have tons of experience with auditions, and knowledge of what it takes to succeed and perform at your finest, and you have a recipe for success!
I have auditioned for every major orchestra in the US (and some abroad as well) and have advanced to finals. Plus, I have coached students and listened to colleagues countless times. I also have a unique approach to playing. The combination of my extensive experience and unique approach allows me to, first, determine whether you have an issue, or whether your issue is just "in your head;" second, to "see" an issue (if you have one) that you are unable to solve by yourself because it is invisible to you; and finally, to provide you with steps that will concretely solve the issue.