My advice to you is to enjoy the time off that you have now.
There are risks involved with "pre-study"
If you are the only one who has done it in the group - you will first be looked upon as cool, but after about an hour of always having your hand up, you will quickly go from cool to tosser!
Work with the group and help each other out. You'll enjoy the bonding and the exam nerves.
Some of the goodytwoshoes will disagree with me I'm sure!