@KimberlyLaila - I’m so happy that this post has been able to help you. This year I was accepted into Andover and Choate.
This year, during my re-application, I’ve learned a LOT.
First of all, communication is key! Always remember to write an email thanking the interviewer and tour guide. For my interviewer, I always write about a specific memory that I enjoyed. For example, “I met and was greeted by so many students, and felt such a strong sense of community…”
Also, do your research! Go onto the site, see what the school’s values are, their goals. In the essays, incorporate them. For example, saw that one school was really into mental health and had wellness week. I wrote about how much I connected with it as well in my essays.
Also, referring back to the communication, remember that you can always email other teachers about your interests. For example, I emailed the community service leaders of the schools and linked them to my community service site. I always cc’d admissions to show that I held interest in the school.
If you have material you want to show, PLEASE DO make a profile! Last year, I was lazy and did a bit, then felt reluctant to do more. Remember, everything you give to them will be ALL they know about your entire character. Add as much as possible!
Overall, the admissions process this year has been a lot smoother than last year. Last year was my first time doing it and it was a shaky road of uncertainty. Remember, you will be fine. No matter what you will succeed!
I also plan to write a huge masterpost on my tips for boarding school in the near future. I just want to write something that may benefit others in a way that I needed when I was applying as well, so you can check back later for that 
I’m not really sure how long until I post it, but it will definitely be before the next admissions process!
Good luck <3