B.M.
The same thing I say every year. Start going to bed early and getting up early two weeks before school starts, make sure you listen to all the teachers, get ready to do homework, and get used to school for the next 8-9 years because you are going to college and I am not supporting you for the rest of your life.
As my kids get older, it seems that the ADHD and ADD (I have two sons) are getting better as they get older. The first year after diagonsis was hell, but they both like getting older and have more responsibility. If you have good communication with the school, the teachers are aware of the problem and they get somewhat different treatment when it comes to tests and there are lists they go through to help the child succeed. Both my children do take the drugs, because they can't cope without them and both went from below average students to A and B students. So my children are actually excited for school to start and can't wait to see their friends again!