Yes, making an accidental mess is embarrassing, but try not to make a scene. Discreetly clean up the spill, apologise to the host and simply ask if there are any extra paper towels. If you've managed to spill your drink on someone else, don't attack them - offer them your napkin and let them wipe themselves off.
Dinner tables should be a no resting zone. "Keep [your elbows] tucked into your body, especially when lifting food into your mouth," MacPherson advises.
Just don't. Leave it in your lap.
Rather than leaning over your dinner and shoveling food into you mouth, sit up straight and take your fork to your mouth!
If you like to gesture, put your knife and fork down before launching into your latest exciting story.
If you don't like what you've been served, at least try a little, MacPherson says you don't have to finish it, and then fill up on water until dessert arrives.
Enough said, really.
A simple question of the person next to you is much less intrusive than an arm in the face.
The best place is on your plate.
It's never as discrete as you think it's going to be, so excuse yourself and find the nearest bathroom.