I think if someone is going for premed, then they have to really consider that GPA trumps all. So I would take a class I had taken before if I hadn’t excelled in it…making sure you have good base knowledge is a good thing.
So take @leiden 's advice, with their 6 posts, with a grain of salt.
I agree with @lbf
I would highly recommend the book by Cal Newport: “How To Become a Straight-A Student:
The Unconventional Strategies Real College Students Use to Score High While Studying Less”
It will help you with time management and how to be more efficient.