Use the grades and comments to evaluate your time and efforts.
First of all, do you think the grades match the time and efforts your put into each
assignment and each class?
Use the resources available to help you use your time more efficiently.
Reassess your priorities. There may be a class that you thought was going to be the
toughest, but it turned out to be not as difficult as you thought, and you have an
A. Maybe some of the time you spent working on that class is better spent for the
remainder of the semester on another class where you'd like to improve your grade.
Review comments carefully.
Many times, in the comments, your professor will share what they think you're doing
well, and where they think there is more room for improvement.
EX "I love having you participate in class, you always share really insightful thoughts
and questions. However, you struggled on the first exam"
Calculate the possibilities.
Another thing faculty often include in the comments is a breakdown of how the grade
is calculated, and how much of your grade for the semester is left to earn. Take that
information (or that information from your syllabus or on Canvas) to calculate a range
of where your grade may be at the end of the semester and set a realistic goal.