A BBQ gas lighter with a long nozzle can be helpful too.
A pair of barbecue gloves is pretty essential; even with the other utensils a grill can get very hot on the hands after a few seconds. I actually use welder's gloves, but you might be more comfortable with something less unwieldy.
Basting brushes for basting meat with BBQ sauce.
When fat does leak onto hot coal it causes flames. Flames don’t cook, they burn; which is bad. So have a spray bottle of water on hand to douse any flames that do appear.
If you need to barbecue large cuts of meat or poultry, a good meat thermometer will come in handy to guarantee they are properly cooked through.
A good fitting BBQ cover will keep the elements out, reduce the amount of cleaning, and extend the life of your barbecue grill by many years.