As you already know, etiquette is one of my favorite topics. Regardless of everything else that defines you (where you live, your profession, or your income) everyone should strive to have good manners and be a gracious host.
I find Emily Post to my my personal inspiration. Then you can only imagine my excitment when The Emily Post Institute started a blog! It's a wonderful daily read for all of those questions that you have about etiquette.