pracs and shit u have to turn up...
but think about it... u wake up u travel to uni, do 3 hours of lectures a day, lunch and travel home. thats a full day. but in those 8 hours what have u really learnt? at the end of most lectures most people are like wtf just happened there. then u get home and dont do shit coz your so tired from all the travelling and just wanna relax.
if one was to sit down and do 6 hours on study on their own, u could learn alot. nothing beats sitting down reading the textbook answering questions, getting them wrong, and then getting better along the way.
shit i know some people would be going good if they did 6 hours of study at all for the whole semester per subject