We go to Yosmite every year as a family vacation, and we call it "Mysemite" because my family has gone there every year for at least 6 generations, from my mom's great-grandmother all the way to my son. When we get there, the first thing we do after unpacking is walk to Happy Isles, get an orange juice bar, and watch the rapids flow under the bridge -- you can't skip the orange juice bar or it's not a real trip to Yosemite. We also put strings of colored lights all around our cabin while we're there -- I have a separate set (of the summery-looking type, not Christmas lights) packed in my camping stuff just for the occasion, which my hubby thinks is weird, but ... it's tradition! Oh, and we pack nice tablecloths and little potted plants for the picnic table. We really settle in and make ourselves at home.

All the cousins get together to decorate gingerbread houses a few weeks before Christmas. My grandma (and now my mom, now that my Grandma has passed) bakes the gingerbread houses and puts them together beforehand, then puts each one on a cardboard cake round, puts out a ton of royal icing and candies, and lets the kids go for it. The houses get more elaborate each year, and we even make little yards on the cake rounds.
Birthday presents are wrapped and placed on the dining table a couple of days before the party to add to the anticipation and make the house look festive.