First Aid > 2nd pass of UWorld unquestionably
Spend an entire day on biochem
An entire day on micro
An entire day on embryo (might sound excessive, but you don't want to be in the 7th block tired as hell and not 1000% sure whether something is left vs right horn of sinus venosus, etc.)
An entire day on pharm (at the end of every chapter and in the pharm chapter itself)
Spread NBME exams out during this time as well. Learn and understand every NBME question you encounter.
That's it.