Recommendations to prepare

I'm currently a highschool sophomore interested in improving my chances of getting into USAFA, my last semesters GPA was 3.87, my freshman year I had perfect attendance and gained almost 12 highschool credits (11.75) as a sophomore in taking all honors classes and I'm in multiple extracurriculars (including band, a few clubs, C.A.P., and my school's JROTC) any recommendations on improving my chances?? (I'm taking the PSAT and the ASVAB later this year)