OptimusPrep
So I had studied for about 1.5 months, and my prep included the following resources:
1. Powerscore CR , Manhattan CR, RC, SC
2. OG 13 Complete
3. GMAT Question Pack 1 (404 practice questions)
4. Kaplan 800 (I found most questions pretty difficult.. but this book seems like a great resource for the tough ones)
Took GMAT Prep tests on every weekend
Scores:
Manhattan CAT 1: 670
Manhattan CAT 2: 650
Manhattan CAT 3: 670
I really found Manhattan CATs to be pretty difficult, so switched onto GMAT Prep tests thereafter.
GMAT Prep Test 1: 710
GMAT Prep Test 2: 730
GMAT Prep Test 3: 710
GMAT Prep Test 4: 680
(Quant was a decent 50 on each, but Verbal kept varying from 32 to 40)
I took the last prep test only 2 days before my GMAT Exam day, and having scored a dismal 680, I was already pretty disappointed. The thought of postponing the test crossed my mind like a thousand times

, but still gave the test thinking of it as yet another Mock Test, that would help me realize my shortcomings, and test my anxiety.
As expected, on the exam day , I floundered in the Sentence Correction questions. My prep for SC mostly included OG Questions(unfortunately I got most of them correct, so didn't bother to study much Grammar thereafter). Consequently, I felt a bit distracted on the CR questions too.
Since I have sort-of exhausted all the prep books, I was thinking of taking some online courses, that will help me enhance my verbal score.