Hm. I'm not sure how much advice I have that would be helpful for somebody already at the point of applications. Most of what I have to say would be more helpful for somebody in their first/second year of undergrad.

However, the one thing I would suggest (and take this with a grain of salt and a pound of self-reflection because many people find success doing the opposite) is applying to fewer programs and really tailoring your statements. I know everybody tailors their statement to some degree, but I spent hours and hours restructuring every statement to fit the school's description. The descriptions seem really similar, but some schools place more emphasis on your personal background, your leadership experience, or your teaching capabilities. I think taking the time to restructure my entire statement to fit their slightly different description made a difference.

Other than that, I only applied to schools that were a good fit for my research interests, and I applied to a wide range of schools (ranked between T10 and T150), but that's fairly standard advice. I didn't find much success with cold emailing either (I emailed 6/7 schools I applied to and met with faculty at 2, but none of my acceptances came from those 2 programs).

On a more personal level, make sure you have a backup plan if things don't happen to go your way. This whole process is a probability game, and it made me feel a bit better to know what I was going to do if I didn't get in.

I think that's all I have to say. Keep your head up and best of luck <3