Offer a special "holiday help" section.
Holiday time leads to a whole new set of customer questions. Consider adding a holiday help section that deals specifically with common holiday issues like shipping deadlines, gift wrapping, etc.
BestBuy.com has a section on holiday shopping tips that includes information on returns, shipping deadlines, etc.
KBToys.com uses a banner to call out links about shipping and ordering during the holidays.
Amazon.com offers a set of links and tips "to make sure your holiday gifts reach their recipients in time."