First of all remember the reason why you have taken science not commerce and arts. I will mention some points for staying motivated and how to study.

• Try to be self motivated.
• Wake up early and start studying
• Make your notes with colourful pens for neet exam.
• For board exam solve ncert.
• Avoid distractions.
• Practice maths 2 hours a day. (to excell in boards)
• Always try to highlight the key points in your notes.
• If you follow any youtube channel then always make notes.
• Try to solve previous year question for neet or boards don't matter.