For us...
All Christmas shopping is done by 1st Dec, so we can enjoy Christmas. We try to do something Christmassy most weekends in the build up.
First weekend in Dec the tree goes up. We always play Xmas music, eat mince pies and drink mulled wine as we do it. The Christmas candle is burnt for a lovely Christmas smell and we decorate the living room together.
One weekend I take my DDs with my mum for a shopping weekend. Sometimes we get a hotel and stay overnight, other times we go for the day. This is when the DDs buy their presents (and any last minute gifts I might need). We also take them to see FC, buy a new bauble for the tree and so on. They're teens now and it is a lovely tradition.
At the start of Dec, one present (the joke present) is wrapped up and disguised. Each day the children can feel, sniff and make one guess as to what the gift is. If they guess correctly (they never have) they can open the present. On Christmas Day, when they open the joke present - it is in layers with clues inside. For example, this year it's tickets to see Hairspray. It will be given inside the lid of a can of hairspray.
Xmas eve morning, DH takes the children to see a Christmas movie at the cinema. There's usually a good golden oldie on at the children's club. I get the house ready and they watch the movie.
Xmas eve one of our friends has a party. It's a lovely way to start Xmas and then we move onto the pub after. All the children get together...
Before bed, everyone is allowed one present from under the tree. This is usually a new set of PJs and something to entertain the children if they wake up stupidly early in the morning.
Christmas morning, FC presents are opened in bed with us. Then we get up and shower, followed by a special breakfast - pancakes, maple syrup and Buck's Fizz.
Big presents opened after breakfast, round the tree. Usually about 10am. Presents are spread out over the day, so it's not all about the presents, but equally it's not all over and done with my 11am! Last set of presents are opened with evening tea.
One present will always be a board game that we'll play together as a family. Generally, no tv on Christmas Day, and the children tend not to go to their rooms (no rule as such, we just spend time together). The girls make the most of having our undivided attention!
Evening we play a game of cards that my grandparents used to play with us (and my DC). We play for money, and whoever wins gets to keep the money. The DC love that, and it's a nice way of remembering my GP at Christmas.
The week between Xmas and new year, we try to see different friends / family most nights. Presents are swapped, we have a meal and play games. It's a nice time to catch up and relax.
I'm like op - organised, a planner and totally in love with Christmas! For us, it lasts a week, not just the day!