I'll second the gleim book option. Hi-light the questions from the gouge in the book and focus on those sections. Also study about METAR/TAF/Wx Symbols, runway marks and signs, NAT tracks, and Performance (screen height, etc) and you be set. It took be me about 7 days and I got a 97. IMHO the phone a friend option will burn lots of valuable time, if you are totally unfamiliar with whats coming.