I never thought that being an adult or going to a party full of adults would require this information, but after my company party last weekend I think that party etiquette is definitely something to be discussed with all the parties people will be attending in the next few weeks.
Here is a list I compiled of Holiday party do's and dont's:
1. DO bring a gift for the Hostess! I've thrown enough parties to know how much stress, time, and money goes into hosting and planning a party and a small thank you gift means a lot. Some things to remember however, is never upstage the hostess; if you want to bring food or a drink call ahead and okay it first.
2. DON'T show up too late. 10 minutes late is generally okay because it gives the hostess a couple more minutes to prepare. Any later than 15 minutes, especially for a dinner party, is rude. The other guests will have to wait around for you and the food will get cold. If the party is less formal, 30 minutes is acceptable. Never show up early unless the hostess has asked... you could end up being more of a distraction.
3. DO say hello and goodbye and remember to thank your hostess at the end of the night.
4. DON'T forget to send a Thank you note within two weeks of the party, and try to include a thing or two about what you enjoyed.
5. DO mingle! Keep conversations light, end conversations gracefully with a "it was so nice to see you, have a great night", and always be polite.