I would suggest doing a mix as well, I seem to retain concepts better when I study some math then some verbal and then back to math etc. Otherwise I tend to get overwhelmed and not remember.
Something I think is useful when you are still early on and use
MGMAT books, plus some other book (Kaplan or the like), and the OG, do not do what
MGMAT tells you to do: I would not go straight from finishing an
MGMAT book chapter to solving the problems they suggest in the OG. Do their end of chapter problems and then find appropriate questions in the Kaplan book and apply/hone your skills there. Here is my reasoning: I want to tackle the OG last as a 'true' test to see if I really took the concepts to heart. Now to train and master the concepts, non-official questions should be sufficient. It will allow you to really test your grasp of the techniques on questions that came from the actual test in the OG.
any snow perseverance? i got my 4-5inches and called in for a Snow Day

720 on the practice its a morale booster