How to organize your workflow

The other day I was looking at my inbox. It was borderline overflowing. Then I made a commitment that I will, once and for all find a filing system that works. Years ago, I purchased David Allen's system that integrates into Outlook. I loved it, but now, several computers later, I don't know what happened to the software...

Well, here is a simple flow-chart, found at GTD Cheatsheet: The Workflow. Tremendously helpful, I thought.