Mulled wine has a long tradition, being heated up with spices to offer something revitalising. Indeed, many countries around the world have their own word for their type of traditional mulled wine - in France it's vin chaud and in Russia it's glintwein (глинтвейн) for example. My favorite is the German term Glühwein which I remember very fondly from a trip to Austria many years ago!
If you'd like to read more about mulled wine here is an interesting web page I found: The history of mulled wine
The other thing you always need at a Christmas party is plenty of ice because no matter what the weather - snow in the Rockies, rain in Scotland or sunshine in Australia - there will be people who want ice in their drinks ... and it needs to be in good supply. You can't afford to run out of what you've frozen in trays in the icebox (they're so fiddly anyway!) so this is where one of the latest kitchen/home appliances comes in - the ice maker. You can buy one of these at most department stores nowadays or online and they're great - I have one and wouldn't be without it. You don't have to plumb it in so it's portable and it's really easy to use. When Christmas has passed you then can look forward to using it for any other celebrations, bbqs etc - it really comes into its own in the summer.