I’m taking the GMAT in September (20th). I am hoping to score greater than 750, as well. I so need a personal success story right now, too! Go you and let me know how it goes!
I took lessons with the lovely and EXTREMELY talented Dr. Janelle Ragno when I lived in Austin, TX. I have had to stop lessons since I moved to AR but hope to start again soon, once I’ve figured out my MBA results and plans. If you are interested in taking lessons with Janelle, here is her bio page with the Orpheus School of Music: http://www.orpheusacademy.com/Faculty/janelleragno.php.
Like any worthwhile endeavor, you should be prepared to commit and practice, practice, practice.