She asked my advice on it a couple of times and I helped especially with the parts about dealing with duplicate listings. (The bane of my existence!) :p
It was just published over at Moz so I wanted to share and think it's def worth a bookmark and covers all the main problem areas that come up.
Troubleshooting Local Ranking Failures: A Beginner's Guide - Moz
Tons of info. Hope it helps!