I took our tree down the weekend after Christmas, but left the nutcrackers and mantle display out a little longer. I meant to take those down last weekend, but things got nuts so I'll do it this weekend instead.
The one thing that makes me so, so sad to take down every year is our Christmas lights. We do all white lights wrapped around tree branches, and just bought icicle lights to hang up with them next year (after Christmas sales FTW!). I ADORE sitting on the couch by our fireplace and looking at them through our living room window! I finally unplugged them this morning just so the neighbors don't think I'm a total nutcase, and I'll actually take them down when it warms up a little bit more outside.