I used a free Merry Christmas file from the Silhouette Design store, printed it on to card-stock as a the base for my card. I already had the Christmas Trees cut out from a previous card I did. (used the negative part, left the positive part for this project.) Once the sentiment is printed and the base card is cut to size add your favorite Christmas type washi tape to it as a background, and then add your embellishment (white tree) onto the washi tape back ground you created, and you whipped up a card in like 5 min. Super awesome right? I suppose you could stamp a sentiment too, but I realized why stamp sentiments?
For a non software/printer card, you can still make a cute card, in even less time.. you just need some washi tape, a printed sentiment (usually from a sticker or from a paper pack to help with layers.)
The key to this is to plan where you want the washi tape at, do you plan on using the whole card base and use washi tape as more of a pattern that is part of the card, or just a couple lines of tape at the bottom?
I actually sat down on a Saturday afternoon and just played with some washi tape, with out an image/sentiment in mind and just played with the washi tape, but if you are a planner, you could have your printed sentiments out and decide how it would work out. I just love the freedom of playing with your paper crafting supplies, and seeing what comes from just playing around.
Keep like colors together, and use the golden design rules when it comes to using washi tape. For example: Use the rules of thirds, a small, medium and large pattern goes well.
So there you have it some easy last minute card ideas, I suppose these would also work for tags too, if you wanted too.
I really think that if you were to go out and buy 3 rolls of washi tape, and use your printer for a sentiment, buy some specialty paper that you can cut the sentiments out. I estimate you could get about 50 cards for about $10, which is really not bad!