The only trick is reading PMBOK and understanding the various inputs, outputs and T$T. There is no trick. People might say this or that but the bottomline is you can't learn without comprehending the concepts promulgated in PMBOK well. I devote 2 hours to PMBOK and the rest 1 to ITTOs and yes, I have paid 30 dollars to subscribe to Brainbok. Is it worth, only time will tell. Study hard and comprehend things. There are no fixed tricks for hard work. Thanks, KK....