How do you use OneNote?

How do you use OneNote? "Although we have several different ways to collect information about how OneNote is used, I am always interested to hear how people use it. And this forum provides an opportunity for a dialog that our other data collection systems don’t really provide. So, let's hear it. How do you use OneNote? How is your notebook organized? What do you do with it? Would you prefer a different type of organization, or even a different concept for OneNote besides a tabbed notebook?
As a starter, I'll go first. I use OneNote for the following activities:
..."

It'd be great if more product planners used blogs for this kind of interaction.