Do two things to start with
1. Appear for a mock test in a total exam environment.
2. If unsureabout that, go for a personalised coaching from a reputed TOEFL tutor.
3. The books you have chosen are more than enough.
We use Birkman's method (Admissions committee of All colleges use ) for a Winning application.
Senior Admission Consultant, ThroughMBA
Panelist | MBA Admissions Achievers Meet
Interviewer | MIT Sloan | Former
Management Consultant | McKinsey & Company | Former