For the food, do not be too ambitious and trying to make too many elaborate dishes. Instead, make sure you satisfy both meat-eaters and vegetarians and a plate of make you know that you make good every time.
Do not spend the entire party serving guests, plan to have some help so that you can be a host or hostess with the "hostess". Determine the theme of fun to the party. If you are looking for adult Dracula party treats with crazy vampire themed performances then you can hop over to various sources online.
There is some truth in the old sayings. Do not let the conversation wander into controversial subjects such as politics or religion classic. It may be interesting, but it can touch a nerve with some people.
Do not feel you are doing people a favor by making introductions force. Introductions fine, but let them happen naturally, most adults know that this is part of enjoying the party.
Do not take phone calls during a party, not unless it is a life or death situation. Mother's story disturbs neighbors and everyone, she would wait until tomorrow.
Now that you know about these things you do not want to do, then the next step is to determine the theme of fun to the party. A small amount of money spent on adult theme parties with adult party bags match will contribute greatly to the success of your party.