From 620 to a 700 in under 2 months!

I scored a 700 overall (Q48, V37) about 1 and a half months after I scored a 620 (Q44, V31). I gave my previous attempt in the first week of September, and after taking a week off, I decided to give the GMAT another go in the first week of November, especially since round 1 MS applications were alre...