How to choose Coaching Institute after 12th Boards for Aptitude Tests

With class 12th Boards already over or on the verge of so, the entire focus shifts towards the upcoming entrance exams. Several Aptitude tests (CLAT, AILET, DU-JET, IPM, SET, IPU-CET, MH-CET etc.) are now lined up with invitations from several coaching institutes. What all must you check to choose the right one?