DONT PANIC! stay calm and think things through, don't wander to far initially in case it all goes t--ts up, if you get wet, hungry or thirsty, go home, reflect and know next time you wont make the same mistakes, see the negative as a positive experience, as you have learnt a valuable lesson, which hopefully you wont make again( or in my case, to many times again!) plan your camp and practice setting it up, set up camp early enough to see what your doing in safety, at least at the start, once you are accomplished at camp set up you can leave it later! learn to pack in the order you need the items first and quickly. check out the minimal kit lists, there are numerous ones on here, and many hints on using the kit you pack, so i guess research is one of the first things you need to do, not just about the kit requirements but about where you are going, old saying, fail to plan, plan to fail.
Think SAFE,TIDY AND SAFE AGAIN, don't forget the first aid bag.
have fun and enjoy yourselves thats the main thing.
Adam