find the best feeder school you can get into. This school in one class had 6 go to MIT, 5 to yale, 4 to Stanford, 12 to duke etc. in the same high school class. There are a relatively small number of public magnets and privates that send way too many kids to these schools to be random.
https://www.ncssm.edu/news/2016/07/23/where-the-class-of-2016-is-headed-to-college