How to best prepare for LSAT with a 6 month time frame?

Hi, I am looking to take the LSAT in June of 2017 and want to start studying now. I have already took the June 2007 diagnostic test and scored a 157. I wish to score in the mid 170's and intend to dedicate significant time towards this. Any tips? My weakest point on the diagnostic was LR- just fyi.