Keep your head on a swivel and always be aware of where you are.
Never walk on the plywood until you know that you can. It may just be a piece of 1/2" covering a floor penetration.
Help out where and when you can; and stay out of the way when you need to.
Remember that the right of way should go to whoever has the hardest time maneuvering. If you've got a box of 1900 box covers and the plumber has a 10' length of 2" cast iron...let him go first.
Play nice with the other kids and you'll get along well and get respect from everyone else on the site.


Stay safe...

Ghost307