Rule
Something easy, cheap and delicious your guests will go bonkers over.
Chicken Salad Cups
Buy Frozen Filo cups, and bake according to the package (8-10 minutes, I think) - let cool and fill with your favorite chicken salad, make the chicken the day before, or buy it pre-packaged.
Fill the cups about 10-20 minutes before your first guest is set to arrive.
Then sprinkle with your favorite fresh herb if you have some on hand, if not dried parsley will do just fine.