Getting good grades in university boils down to your ability to study, the number one thing is your preparation and how you manage your time, you shouldn't wait till it's time for exams before you start, petition your reading time at night where you revise previous lessons and form a study group with your peers.
You can also explore past exam question papers from your seniors and see if you can learn from them, most exams questins are culled from past examinations, you can also attend tutoring in your college classes which are mostly organized by senior students in your department.
You can also explore past exam question papers from your seniors and see if you can learn from them, most exams questins are culled from past examinations, you can also attend tutoring in your college classes which are mostly organized by senior students in your department.