I recommend that everyone buy all three books. They pay for themselves -- both the time and money you invest -- in weeks or even days. And the peace of mind his system gives you is priceless.

If you'd like to first familiarize yourself with Allen's methodology, please check out the or entries. (Note: Normally, Computerworld does not reference wiki-based information, but I can vouch for the fidelity of both these entries.)

Allen's system is flexible; you can choose your own software and systems for storing your information. His suggestions, however, default to physical in-boxes, ink pens, index cards and paper folders as primary methods for collecting, processing, organizing and reviewing actions, projects, goals and the like.

Most technology-loving people (the kind who would be reading this article on this site) avoid the physical and gravitate toward the digital, usually Microsoft Outlook. Dedicated Getting Things Done (GTD) applications exist. Mobile professionals add a smart phone to the mix for capturing ideas and information.

All this is great. But for digital nomads, there are three missing elements to the standard setup used by most GTD enthusiasts.