Retaking LSAT

I am planning to take the LSAT this June 2014, I took the LSAT in December and after studying for a year I went from a diagnostic of 139 to a score of 155(Dec 13). I used Blueprint, Manhattan, Powerscore and of course 7sage. I am wondering how can I use 7sage to continue my studies and reach my goal of 160+? Is this a good idea?