When you are breaking camp, you're all hooked up, and you're about to leave your site, step back from your rig and slowly walk completely around your rig. Look at your roof and check the vents, check your connection points to make sure nothing is still attached, check your stabilizers to make sure they are up, check your windows
to make sure they are all closed, check your door steps to make sure they are secured, check your wheels to make sure all chocks are removed and remind yourself to remove leveler blocks before leaving, and finally check your hitch set up to make sure everything is properly connected up. Think of yourself as a pilot doing a pre-departure walk around flight check. I also do this everytime I stop to fill up with gas. I do a walk around just to make sure everything is okay. I give the whole rig a quick look over.