We do a nice dinner, Candlelight service, then usually have a party for family members after church. Then we put beer and cookies out for Santa.
This year, though, my dad came to our house (9 hours away from home). So we're doing Christmas Eve dinner and Church with my boyfriend's Dad, then going to a party at the parsonage. When we get home, we'll leave beer out for Santa.
I'm making Spinach dip right now.
ETA: We also ALWAYS have scratch off lottery tickets underneath the plates for Christmas Eve and Christmas dinners. I've got a stack sitting on my desk right now.