Be as physically fit as you can. Being out of shape on course is like playing a video game on hard mode.
Teach yourself to separate from electronics, social media, and texting people every 30 seconds before you go on course.
Your instructors likely have years worth of experience of catching students trying to pull little tricks and take short cuts. A shortcut you think you figured out has been tried before,
Don't lie no matter how insignificant it might seem. Leave your ego at home, accept mistakes, learn from it and move on.
Stay away from dating or trying to screw around with course mates.
Don't over pack.
Get used to waking up very early and going to bed very late.
Be as physically fit as you can.