Here's some advice for you guys and girls;
1. Wake up early. Force yourself for the next month to wake up at 5 am. Not only that, wake up at 5 am and shave. Get your face toughened up and ready for shaving ever day. This will also help you teach yourself to shave faster- shave in under 5 minutes.
2. Start running. Wake up, shave and go for a jog. It doesn't have to be a death run. Aim for 5Kms in 35 minutes, then 30 then if you can 25. Get your body used to waking up and working out.
3. When you get back from your run shower and see how quickly you can shower. See if you can do it in 2 minutes.
Biggest problem I've seen or heard of people having is basic fitness and being able to manage their time. If you start working at it even just a month before course your course will be much easier and you will be less tempted to quit or "hurt yourself on PT".