Throughout the holiday time, when there is plenty going on that the most vivacious individuals may sometimes look forward to the calm break in the new year, it's very easy to forget things. I expect I cannot be the only one who has once been surprised awake while at work by a text by a friend asking, "What time are we expected us tonight?" Don't worry; whether you're absent minded, and just inclined toward impromptu plans, I've got some solutions.
Firstly, though I can't stress this enough, if you have organized long in advance versus just a quarter-hour, the greatest parties are the most straightforward. What everyone is hoping for is a good chat, a drink to enjoy, plus enough food that they don't feel like chewing something on the ride back. Unless you are throwing a lavish ball, nobody anticipates extensive drinks, Michelin-starred catering and musical performances.
The most successful parties are the most basic. That said, an idea is useful to disguise the reality you have only put the party together on the way home from work.
Still, an overarching idea works well to conceal that you have only thrown the party on on the way after work. And by theme, I mean for example Christmas. Getting slightly more detailed (Swedish-style festivities, for instance, featuring glögg, warm beverage, fish snacks plus crispbreads, Scandinavian music playlist; or Mexican Christmas, with holiday punch, cold beers or cocktails, and plenty of snacks, salsa & green spread, and festive music playing) will focus your choices on the upcoming grocery run.
While shopping, select a couple of drinks (one alcoholic if you drink, a non-alcoholic one for some avoid alcohol) plus a few nibbles that fit your concept, then purchase as much of them within your budget, instead of stressing over giving people endless options. Nothing appears more abundant and cheerful than abundance – I would always prefer to be welcomed by a container filled with chilled bottles of competitively priced crémant or cava than a single glass with expensive champagne. (Add some bags for chilling, as well; there is seldom enough ice.)
If you must demonstrate skills and offer a mixed drink, then pre-mix a sizable amount in a jug so you're not left busying yourself with preparation while you should be enjoying yourself. After starting, ask a close friend or volunteer to keep an eye on the drinks and top up as necessary until it's gone. Apply the same for the non-alcoholic punch; people enjoy to have a task during gatherings so they may share in the festive spirit.
On the punch front, whatever mix you pick (there are many online), avoid any recipe too sweet – children there should have their own drinks – and if it's available, place aromatic bitters close by (refrain from putting any to the bowl since they're unsafe for those who do not consume drinks altogether). Take care with how it looks so that the alcohol-free drink doesn't seem unimportant; it doesn't take a moment to slice some slices of citrus for garnish.
Personally, I'd skip the readymade trays with "party foods" available in supermarkets seasonally; they feel overly complicated, and usually require using the oven (if you must opt for these, remember that all guests quietly likes herb bread and/or small hot dogs anyway). It's my firm opinion nothing beats two sizable bowls with decent chips (plain salted is universally liked), plus, provided there are no issues, some of those big and excellent value bags of mixed nuts often sold with global foods of supermarkets, with perhaps some olives without stones for colour (it's best to avoid to find pits around the house months later).
In case, as my mother says, you think crisps substantial fare, one big slab of quality cheese on a board and crispbreads and some elegantly arranged grapes often appears painterly. A platter with some preserved or ready-to-eat salami or salmon laid out on it (only one type, except if money is no object), alternatively an attractive pre-made pie, like those that appear on deli counters at this time of year, is more satisfying, while you truly can't go wrong by serving rustic pieces of Italian bread, because they don't need spreading butter.