When your dreams of a family tree-trimming are shattered by kids who fight and lights that don't work, it's hard to reconcile with your feelings of the perfect holiday. Walfish warns against counting on a perfect, planned holiday scenario. "Watch out for any personal wish to make the holidays a 'perfect, magical time,'" she says. You will be setting yourself up for a huge letdown. The more relaxed and flexible you are, the more calm and happy your child will be. Instead, plan for and around hiccups so your children aren't high-strung with your unrealistic expectations.