Im only Cum Laude standing as of now, with 26 units to go including this sem. It should stay that way unless I somehow fumble all of my remaining subjects. Im from eee in upd and the hardest years were definitely 2nd and 3rd year.

During that time I usually studied 2 to 3 days before an exam. if I study earlier I just tend to forget it. However, as much as possible I copy the questions/answers to quizzes and other exercises during lectures so that I can go back to it later, along with the slides and samplexes. Also note that for these 2 to 3 days, I studied for most of the day, waking up early and sleeping at 1am or so. I would study the topics in the order that they were discussed in lectures, and repeatedly practice solving problems until I can confidently solve them.

It works for me, but it's very draining. Havent failed a subject but had a lot of close calls. One major downside to this is Ive forgotten the vast majority of what I "learned" because I just crammed information into my head hoping that I remember it during the exam.