What are most common greenhorn mistakes?

Here's one good tip fer' ya',,when you hook your fiver to your truck raise your front landing gear 1" off the ground then go into the truck,apply your trailer brakes and slowly pull ahead to make sure the hitch is locked,i do this every time and my truck bed and fiver have never been in contact!!!

Have fun!

Red Green:
A man only needs 2 tools:
If it moves and it shouldn't - duct tape
If it doesn't move and it should - wd40