german math graduate

Step1: sit one free exam from GMATPrep software Step2: this will tell you where you need to put most hours in. For me it was math. (my math was like 60%-ish, while my verbal wsa 90%+). For you it's likely to be the other way.

Now. Step3.

If you have enough time buy the whole MGMAT course and study every book - can't go wrong. Safe bet. But need like 3 months if you dont want to go nuts.

If you need shit out of the way in 2 months I would only buy some MGMAT books. SC book is amazing - must read.

I didnt use online training courses but people say its good. Veritasprep. Princeton GMAT. GMAT Pill. Its definitely a lot quicker.

gmatclub.com --- your new home page. God did I hate the place. But honestly this is the single best corner of the web for GMAT. Read it, love it, sleep with it. Guys there will teach you anything and everything.

Source: own experience. Got 720 with 1 month prep not ideal but then I never applied anywhere except for Oggsford MFE anyhow.