I scored an 11 on my VR in 2011, and a 131 in 2015. I used EK + official materials (AAMC + KA [in 2015]) to prep for them both times. In between the two tests I also took tons of humanities courses, to which I attribute my improvement. Correlation or causation? Who knows. I know most people aren't in a position to take tons of hum courses. Even so, picking up an annotated reader in important primary texts in philosophy, history, etc. (if such a thing exists) might exercise your "what is this badly-writing author actually telling me?" muscles. Just thought it might be helpful