Considering the unspoken prejudice against those who don't handle themselves skillfully at table, perhaps the only thing better is being confident of your table etiquette. Here are some key points that will serve you well whether you're at the Ritz or Mickey Dee's. Don't hold your fork like a cello or your knife like Lady Macbeth's dagger. Also, don't wave your cutlery triumphantly in the air to emphasize a point and don't put silverware partly on the table and partly on the plate. After you pick up a piece of cutlery, it should never touch the table again.
Knives go on the plate, blade facing in and touching the inside of the plate.
Only the handle should rest on the rim of the plate. And yes, your mother was right. Don't blot or rub the lower half of your face. Don't flap your napkin to unfold it. Don't wave it around like a flag.