To-do lists have always been around. We all make a grocery list, or a list of items needed to complete a project. Archaeologists have even found 4,000-year-old to-do lists inside the Pyramids.
There's a great to-do function built into the 95LX's Appointment Book. It offers a one-line description of the item, a date when the item was entered, a carry forward option (for those items that you never seem to finish) and a priority assignment.
You can even enter a 440-character note describing each task. It's very simple to use this feature, and there are ways to "jazz it up" and make the 95LX's To-do list more useful than a day planner.