How can I become one of those Geeks who can do VERY well on exams without much efforts?

Many of us watched Weird Al’s ‘White ‘n Nerdy’, but is it possible for such a being to exist? are there any MORE-Geeky people?

If yes, how can I be one of those geeks who know so much and have no trouble doing school exams with perfect grades all the time?

I know I need to read ALOT? but how can I stay motivated to do that all the time??

Thanks