I myself have a holiday party to attend. Attire aside, here is the first of my tips for not only making a good impression on your coworkers and colleagues, but ensuring that you have a wonderful time at this festive event. Trust me.
Tip #1: Eat a light snack a few hours before the party.
Why? You won't feel like Mrs. Claus after you've stuffed your face with hors d'oeuvres during cocktail hour, and no one will stare at you as you scarf down those pigs in a blanket. I've been there - hitting the holiday party on an empty stomach, ravenous for anything with peppermint or liquor in it. It's OK to enjoy food, but you're only making up for what your stomach is sounding off as a federal emergency (growl!). This leaves no room for the main course, or whatever it is you're being served, and you'll probably feel really full really quickly, thus very un-festive. Plus, your coworkers won't think you're only there for the food. (On a side note, if food is not a highlight of this party, capitalize on those apps. Mange.)
Some pre-party snacks I enjoy are fruits, a handful of nuts, peanut butter crackers and granola bars.
I'm not a nutritionist. I'm only telling you what works for me: having a snack before a party helps me not to overindulge. Because, let me tell you, I'm going to eat what I want. (Deprivation also leads to overindulgence.) Some holiday party advice, from me to you, is to grab a snack and go to your holiday party - not with food on the mind, but wanting to spend time with friends and family.