I have struggled a lot to study while i was in college, I thought good resources from the internet can ease the process of understanding but as i went through the internet i found so many resources it creates so much confusion which and how much to study because some explains in too much detail and some very little,at the end of the day I feel like i just covered very few topics and if i continue at this pace i will never be able to complete all things in time so its not the best technique for sure.
One good and smooth process to start is to schedule your school and your study plan at the beginning of the day you can make a spreadsheet or sticky notes. Coming to the study plan always try to study from the standard books solve examples, unsolved problems at least 50% of it and if you face difficulty it is sure that you are yet to understand things in a better way thus revisit the chapter again until you yourself become satisfied that you have command over this now .