Start preparing for the entrance exams, starting from today itself. Like preparing for any exam, set targets. Focus more on the topics you are not strong in.

• Revise the topics as much as you can. 
• Get hold of the question papers of the entrance exams that took place before to get acquainted with the pattern in which the papers are set. 
• Solve the papers in the time that will be allotted to you so that you can solve them faster.
• Cover all the topics from classes 11 and 12 relating to economics, accounts, and business studies. Brush up your logical reasoning, aptitude, quantitative and current affairs.

If you follow these properly, you are bound to score good marks. So keep working hard and revise both your strengths and weaknesses.