And I'm going to be honest with myself, worry a lot about the whole process, and generally attempt to maximize every variable still under my control until I'm holding a Match envelope in my hand. I admire your zen, though.
That includes:
-Letters of Recommendation (2 rads is okay, right? how are you going about representing your parallel projects with multiple mentors despite having to also include clinical letters? I figured 2 rads / research + clinical rads elective, 2 clinical was a good split)
-Personal Statement (shorter is better, I'm assuming. Like 500 words short.)
-Interview preparation, grooming, and attire (I know this sounds ridiculous, but I think working out religiously, being tall / reasonably aesthetically pleasing and having a custom-fit suit conveys a sense of professionalism and "alpha" that makes us seem more confident / intelligent. When I walk into a room I am thinking to myself, project utter calm and confidence coupled with friendliness and humility. Mantra throughout third year, worked well. By the way, I firmly believe that fat people are actively discriminated against in the residency match process.)
-Post-interview contact (god, I don't even want to think about that bull****)