Gifts of time (you could print and wrap a certificate for these):
*A scrapbooking/baking/crafting/whatever day at your house
*A night of babysitting
*Help with the housekeeping (in general, or a specific and hated chore)
*Pet sitting or grooming
*A movie night at your house - you supply the movie, popcorn, candy, etc.
It is, admittedly, a bit late to be getting things mailed off. If you don't mind running late, these ideas could be adapted to be shipped off. For example, you could put together a baking basket with ingredients, supplies, and recipes; a scrapbooking basket with scapbooking supplies; a movie basket containing a movie or gift card with popcorn and candy, etc.
Tomorrow being Christmas Eve, I hope everyone is ready, and that you will be able to just relax and enjoy this holiday and the people you are sharing it with.