Hi Sudhir,

You have not mentioned your board here.

By the way the 12th admit card comes 10-15 days before the board exams.

Don't panic as soon as board will release your admit card, you will be getting it from your School.

Here are some of the tips which will help you top score higher in your board exams:-

• Know the syllabus and exam pattern

• Conceptual clarity is a must

• Practice Previous Year's Questions and Sample Papers

• Make Daily Study Plan

• Refer to the Best Books

• Group study proved as a Boon

• Take proper diet and Sleep

• Stay Away from Distraction

• Make Strategy to write answers

• Be confident about your preparation

You may refer to this article for more descriptive and subject-wise tips.

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If you require to know colleges for which you are eligible then you should go to the link mentioned below.

Link - JEE Main College Predictor

I hope this information helps you.

Good Luck!