1. Christmasfy all your living spaces
Don't just limit decorations to one main room or your Christmas tree, go room to room and add little Christmas or seasonal touches to everything, like Christmas themed pillows on the couch, a small desktop tree in your bathroom, a garland across your windowsill, a Nativity scene in your office, etc.
2. Volunteer to send Christmas cheer
There are many hospital, hospice, and military organizations who link you with recipients who would love a bit of Christmas cheer in the form of hand written cards, gifts, and baked treats.
3. Make Christmas Eve Boxes
On Christmas Eve, present family and friends who are staying with you, with Christmas Eve boxes filled with Christmas pjs, slippers, and socks (which they can wear to bed to wake up in the morning of, in), sweet treats, mugs and cocoa, their favorite Christmas movies/cds, and for younger children, Christmas activity or themed books.
4. Go to a Local Freebie
There are usually tons of free adult or family friendly activities around the holidays that you can go to. Go check out the local outdoor screening of Christmas movies, Go to your cities tree lighting ceremony, check out a holiday parade, etc.
5. Make a Christmas Fort
On a cold blustery night, whether you have kids or not, gather together all the blankets, pillows, and lights that you can find, and create your own Christmas fort and snuggle in for Christmas movie or to listen to your favorite Christmas jams. Be sure to serve yourself Christmas candies and treats and hot cider, chocolate, or other adult beverages.
6. Create a Christmas Memory Album/Book
Most of us have tons of photos and keepsakes from Christmases past, but rarely do we do anything but save them in files. Pull them out and go through them, and create a book or album that can be easily shared with future generations. If paper is not your thing, you can even go online and create a free website like the ones on Wix.com, that can hold all your memories that can be sent to family and friends near and far.
7. DIY Advent Calendar
Get creative and put together your own advent calendar which will help you count down the days and build up the excitement until Christmas comes. Fill yours with anything from passages from the Night Before Christmas, to bible phrases, to candy, to little toys and trinkets. The sky is the limit.
8. Road Trip to a Festival of Lights
Take a weekend drive to see another town/cities festival of lights, Christmas trees, or the most lit streets that they have. It will be fun to see how other towns/cities do it.
9. Take a Family Portrait
It doesn't have to be complicated at all and don't worry about making it "perfect." Just go outside, find a nice background of some trees, or your house, or something more creative that fits your mood, and put your camera on a stand/tripod or have someone snap a shot of your family so you can have a memory of you all together to mark the end of the year.
10. Christmas Cookiefest
Gather all your friends/family and have them bring over their favorite cookie recipes and ingredients, and then make big batches of the doughs that you can freeze and split between you all so any time during the season, you'll have plenty of cookies to choose from without having to make them or buy them.