In order to prepare for your 10th class boards exam it is very important that you should be aware of the complete syllabus. 

You can make your important time table which will help you to complete your syllabus and you will get sufficient time for revision. 

You can refer previous year papers to get an idea about the exam pattern and type of questions asked in the exam. 

To score good marks in your exam it is very important that you build conceptual understanding. 

You can also prepare your notes which will help you at the time of revision. 

Keep the complete list of formulae, experiments, and derivations.

Refer NCERT books for your preparation it will help you to score good marks. 

Try to understand the concepts. You can get direct formula based questions as well. 

Chemistry is a scoring subject. It is important to solve as many as questions to develop a speed and accuracy. In Biology focus on the diagrams. 

For Mathematics, basic geometry, trigonometry and the concept of numbers are important

All the Best!!