plz help

hiiii,
my attempt (ca final) is in this nov .....there is only 3 months left.......and i took coaching of only two subjecti.e sfm and law.....  and  now my accounting coaching is giong on...and not enough time for preparation due to articleship .......so  i  decide to go for   one group i,e first one .....plz advice me how to prepare for exam ....how to clear it in one attempt