A lot the time, I use white, lined pages for lists, like shopping lists. For the grocery and pharmacy, I keep a running list and cross off each item as I buy it. I just add new items to the end of the list.
When one side is full, I've discovered I can turn the page over and upside down, and fit it back into the rings. That way, the back of the page becomes the front.
For more long-term tasks or large purchases, I use the To Do pages.
How do you keep lists? Do you wish there were different kinds of list pages?