First, establish some new traditions. One thing that keeps us connected is a consistent way of doing things. It can be a simple tradition, like trying a new cookie recipe each year. Maybe you like to do things outside, so try to go find a new place to run outside in the cold weather as a family. Just do it the same way, so it becomes a tradition.
Second, preserve some of the traditions you had when your family was together. My ex-mother-in-law made homemade turkey noodle soup after Thanksgiving every year. I have adopted that tradition, and my kids really look forward to it. (I don't take the time to make noodles from scratch most of the year). Keeping a few old traditions helps your family to know that the good things continue.
Do your best to work a schedule out that allows everyone to participate in the holidays. The standard possession order in Texas provides for one party to have the first half of the Winter break from school until December 28th at noon. The other party then is to have the second half of the break. However, if both parties agree, anything is ok to do with the schedule. I do recommend that you put things in writing.
If you have small children, consider spending Christmas morning together. This is a popular co-parenting choice, because it helps Santa to deliver his presents to one tree, and kids like to open presents all at once! Of course this is only recommended if you can get along well and there is no violence in your relationship.
Consider starting a gratitude journal or a family gratitude jar. Something like this can help focus your thoughts on the blessings that surround you and your family. Many times when you go through a divorce, it is hard to see all the good things that the changes are bringing to you. Focusing your energy on gratitude is a way to see that clearly and is easier to do around the holiday season.
Finally, if you and your family are lucky enough to have the ability to help someone else, do it! Whether you can volunteer to serve a meal or stock a food pantry or shop for an angel tree, doing good helps ease stress. Doing good for someone else is good for the whole family. The holiday season provides plenty of unique opportunities to do something that will benefit someone else.
Here's wishing you and yours a happy holiday season!