As a current college student, different study methods work with different people. When you first encounter college courses, it's perfectly reasonable to experiment different methods before locking in on what works for you.
Personally, what works for me is studying throughout the course. After every lecture, I find it beneficial to look through my notes or even rewatch the lecture to make sure that I understand the content. This allows you to figure out what concepts you're still shaky on, so that way you can approach your professor or TA during office hours. This also prevents you from cramming/procrastinating before midterms and finals, which can cause a great deal of stress.
It also helps to stay accountable of all of the different things that could be going on in your life. I used to use a planner, but sometimes it can be difficult to keep up with. Now, I used Google Calendar to make sure that I don't miss any events and I also take advantage of the tasks gear to use as a personal checklist.
In terms of studying for a big exam, I find it helpful to make lists and concept maps to better organize your ideas. Especially with classes that are more conceptual-based, it can be overwhelming to retain all of the information. Do this over a period of several days so that you don't overstress yourself.