Well there are couple of things you can focus on for Verbal
1) Assuming you have probs in all sections , just try to get to basics of getting into concepts first
2) Pick up any reputed book ( OG for e.g) and study it , try out problems and when you make a mistake analyze why you made that mistake . Learn why you made that mistake and what the correct answer says and what concept was tested there . Thats where you got to have your TAKEWAY---> Log this lesson as a note into your Notes.. FOr SC dont miss learning from Manhattan SC .
3) For CR , i suggest you pick up Powerscore CR bible . Its very exhaustive and explains you all nuts and bolts of CR .Key again here is focus on concepts..Then try out OG problems and learn from your mistakes you do same as point (2) above
4) RC , no real specfic rule i can suggest as its very subjective . But tackling RC in GMAT is not just about reading . Its about comprehending what you read . You should look at Big Picture and focus on main idea than on finer details while reading RC . Try to focus on aspects like , why this passage has been written and what author is trying to tell you . Make an outline of the entrire passage . You can google some greats posts by RON/STACEY on how to master RC in this forum . They have some real expert advise . Kaplan Verbal Book also seems good at this . You can try .
You need to build up strategy for attacking each section in Verbal and once you practice more and more you will come to recognize certain patterns . This can help you in building up your strategy .
Having said all that , GMAT is a mind game and your attitude matters a lot while attacking it .But good news is , GMAT is all about smart thinking and building strategies and once you are equipped with all such tip,tricks , strategies , concepts you can crack and beat it