During the work day, truck drivers will be rushed. "Some times it seems as if the load has to be there "yesterday."
Before leaving the place where your truck is parked, there are some items on the vehicle that MUST be checked before leaving. Ensure that these following items are absolutely checked before you start your trip each day, and several times over the course of your day.
Of late, I've heard stories of several truck driver finding out too late that some unkind person has pulled the locking pin on their trailer while the vehicle was parked - be sure to check the security of your semi-trailer hook-up each time you return to your vehicle - a moment of your time could save you a "world of grief!"