I'm a senior biochemistry major and math minor at a mid-sized research school. I'm looking into programs for biophysics or biophysical chemistry. My GRE scores are 154 quant, 150 verbal, and I have a 3.2 GPA. I have ~8 months of experience in a research lab which I won an award in, however that's outside of my field now. I have about 6 months of experience in a biophysical lab, and I'm working on submitting a publication. I've taken 5 graduate level classes, am the president of an academic club, am TAing for a biophysical chemistry class, and have previously held workshops for quantitative chemistry classes. I'm taking the chemistry GRE soon.
Aside from my low GPA and GRE scores, I think this makes for a good application. What could I do in my remaining semesters to improve my chances of getting into a good (tier 1 or 2) grad school?