Yoo...more energy to you bro.
You know if you haven't been putting in the effort, you'll need to try twice as hard to catch up and do better than your mates.
Try and talk to your seniors, they may blab about a lot but you might be able to pick a few points about the exam, especially the nature of your lecturers.
Also, study with the geeks that sit in the front row they know what was said in class and are reading it..you can even look at their notes...snap their summarily notes chew and digest it...
Find past questions...5 years before...pieces them...no how you no go pass