stagnating scores for surgery shelf?

I have my surgery shelf in a few weeks and my scores on NBME have been all in the range of 72-76%. I already finished uworld surg shelf questions and I've been doing amboss questions and anki. I think my time management can be better because I always finish with only 5 minutes left, and I know I have to go back to review specific questions. But besides that, any advice on how to get to 80% + ? I have been reviewing the nbmes and making cards for incorrects also