The Other McCain notes the slowdown in web traffic as people enjoy their families and real lives at Christmas.
Time to do what newspapers and TV do. Visit the archives and bring back good stuff from earlier in the year. It fills the space with different stuff and besides, you might have forgotten something good you wrote back in the spring.
Sure, search engines can find past posts and bring traffic (especially if the post includes a picture of Megan Fox). But you're always the best search engine for your site.