Hi, i don't think there is a best way to pass the atpl exams (each to his own) but the first step is to select an approved ground school provider (i went with Bristol). Then learn your work, do the progress tests, go through the database once (have not done this for mod2 which i'm sitting in Feb) attend brush up and do all the work they set. This worked for me one mod1 although my personal experience was that going through the QB before the brush up was a waste of time and money as you get all of them at brush up.
Cpl - IR - I'm not there yet but i guess the first step is to find a good school with a high pass rate (really impressed with Bonus, Stapleford CTC and Oxford right now)
good luck