First of all be confident. Now coming on to your query you should learn the AAS from Institute's Mat with full text. After that for summararised reading you can go for Shurbhi Bansal or any other good book in market. Other than AAS you can go through Paduka (if you have time)or Shurbhi Bansal(if you have little time) and lastly institute's compiler(For getting how to answer questions & for practice).
CAclubindia
