Rule #1: Be prepared.
“I always make sure I have a few things in my kitchen at all times, so if I find out about a last-minute guest, I'm never unprepared. Here are my essentials: a chilled bottle of champagne, olives, crackers/breadsticks, nuts (I prefer Marcona almonds), dried fruit, pasta (in a pinch, some minced garlic, salt, pepper, and olive oil makes an easy dinner).”