Is there anything I can do to maximize my chances to get full ride scholarships as a sophomore?

I live in a high income household, but not high enough that we can justify paying the npc estimate, upwards of 40k for some colleges. As a sophomore in high school, I've maxed out my course rigor currently, with a 97/100 uw freshman year, and I have some EC's and leadership (nothing impressive though).

Is there anything specific I could do now to maximize my chances of getting full tuition or full ride scholarships in my senior year, or is that something I should only be thinking about when I actually apply to college? And preferably, I'd like to get a scholarship at a T100 university.

Thanks in advance!