An Advanced To Do List
I use a free application called Remember the Milk. It also has an app for the iPhone. It’s incredibly useful. I can create customized lists for what I have to do. It allows me to set due dates and also the priority of the task at hand. It is much easier for me to just look at my phone to see what I have to do, than to carry around a tattered piece of paper.
I update it all of the time, because I am a busy person and it helps me tremendously. For example, when I have to travel, I make a customized list for what I have to do to get ready.