How do you prepare for IR?

If it weren't for the IR section, I would have been already registered to take the GMAT. I got my basics done, I score in the 80\80 percentiles but I have not even touched the IR section. I am kind of lacking motivation, in part because I am not sure if there is any guide out there that could sufficiently help me. I do have MGMAT IR Guide but it does not seem to be that useful. I would be happy with 6-7 in the IR.

Any suggestions?