At first glance, it might seem like a personalized page is uncacheable. After all, there is no way of predicting when a user will change his preferences. And that much is true. But there are still some steps you can take to improve the cacheability of a channel. For instance, in the Movie Review Channel, while the front page may change all the time, the movie reviews it points to are all static and can be set to cache for long periods of time.