Schools in US prefer students to have the followings:
- High level of English
- Good grades
- Good test scores
- Outstanding extracurricular activities
- Good interview
- Good essays
To prepare for the interviews, read more English books and watch a lot of US TV, talk to a lot of students who are native English speakers, go to summer school, etc.
In terms of extracurricular activities, it is important that whatever you do, the schools can see your passion. Meaning that if you play piano, they will want to see the grades you’ve achieved or prizes you’ve won, how your music teachers are very supportive of your efforts. Keep that up and many of the schools will be interested.
