IMO the most effective way to get CHRIST back into CHRISTmas is to stop soliciting stores that use phrases like Happy Holidays, or holiday shopping, or holiday music, etc. etc. etc. if people just stopped buying maybe stores would get the hint but unfortunately most Americans don't care enough to take a stand.
Honestly, I don't think that will work. They ALL are doing it.
I don't have any problem if someone says Happy Holiday instead of Merry Christmas. Someone saying Happy Solstice Day is another story though
The best way to put Christ into Christmas is to ignore the media hype and the timing sequence the media plays for us.
Buy the gifts you want to give all year long. There is no sale worth its hassle. Wrap all year and have all your gift shopping done by Thanksgiving Day. Spend Thanksgiving in the Lord and your family. Spend the next four weeks of Advent doing the homey and enjoyable things of Christmas, like setting up a tree and making cookies. You control the pace...not the culture or the sales brochures.