1. Communicate with your brother: Sit down and have an honest conversation with your sibling about the importance of privacy and personal space. Explain why you need your own space and try to find a common ground.

2. Set boundaries: Clearly define the boundaries of your room by marking the entrance, and emphasize that crossing this boundary without permission is not acceptable.

3. Establish clear rules: Create a set of simple rules regarding entry into your room. Ensure that your brother understands these rules and agrees to follow them.

4. Create a schedule: If you find it necessary to share items in your room, establish a schedule when both of you can access the room without intruding on each other’s privacy.

5. Use incentives: Offer rewards or privileges if your brother follows the established rules and stays out of your room. This could be anything from extra screen time to his favorite treat.

6. Provide alternative spaces: If possible, create a separate area in your home where your brother can play or spend time, so he has no need to enter your room.

7. Lock your door: If nothing else works, consider installing a lock on your door to prevent unauthorized entry (with parents’ permission, of course).

8. Keep valuables out of sight: If there are specific items that draw your brother’s attention and entice him into your room, consider storing them in a secure location or hiding them from view when not in use.

9. Display a ‘Do not disturb’ sign: A simple reminder on the door may help deter unwanted entry, especially if it is combined with other strategies on this list.

10. Involve an adult: If all else fails, speak with a parent or guardian about the ongoing issue. They may be able to mediate between both parties and help resolve the situation once and for all.

In conclusion, maintaining one’s personal space is important for a healthy sibling relationship. By implementing these strategies, you can foster a sense of respect and cooperation while keeping your room as your personal sanctuary.