Read my CR and RC guides (In my signature below). I would also recommend following "GMATNinja" and "Generis" for SC. If you do this, you should see a steady improvement in your Verbal score.
For mocks, avoid Kaplan on everything. Stick to OG and LSAT for sources. Also, do not take a ton of mocks. Mocks should be used for two things: To see where you stand in your progress and to practice managing the anxiety of test day. Short of this, your growth will come from learning proper techniques, reviewing properly, and practicing questions.