I do it like lolar2 suggested upthread. I dislike all the fuss about Christmas and really dislike the way retail ignores Thanksgiving. However, I don't mind my own version of holiday decor. We get one tree and decorate it with our favorite ornaments and "other" items. We pare down each year since certain people seem to think we need an endless supply of ornaments. To be fair, these people have DD's best interests at heart and just want her to have her own set of ornaments when she is old enough to move out. The challenge is there are three of these people. Three times 18 years will equal 54 ornaments and if she stays with us through college the number will go up even more.
Anyway, AFTER Thanksgiving weekend (yes, the WHOLE weekend is devoted to Thanksgiving), then we will start slowly swapping Christmas items for "everyday" items. Towels and placemats and potholders are typically the first round. I have a couple holiday picture frames that I swap out, too. Then, DD will put up holiday clings wherever she wishes.
We buy our tree two or three weekends before Christmas, depending on when the 25th falls during the week, and we devote that whole weekend to fun holiday traditions. By Monday, the house is holiday'd out and we enjoy it until the weekend after Christmas. Recently, Christmas was on a Friday and by Sunday, the house was back to normal.
That is the quickest we'd do. DD absolutely ADORES our holiday traditions and DH & I developed them based on *our* likes and dislikes, so we really LIKE them, too.
We have four family members who live within a four-hour drive of us and we invite them to the line-up of holiday events. They each have varying degrees of "issues" and pick & choose what they participate in. It works really nicely for us since they tend to attend the easiest events and never ALL of them at once (not since the first Christmas DD was here, thank goodness...THAT Christmas should NEVER be repeated). Our favorite relatives coincidentally tend to hang out with us the most!