I would recommend getting the book, if you feel it is something that will help. If you have a system that works for you, by all means keep up with it! Both of the tools do make more sense if you have read the book.

I have used a bevy of tools for GTD, including the two you mentioned. I have been using Things for about a year now and it works well for me. I agree with your assessment re: the complexity of Omnifocus.

However, I recommend anyone getting into GTD to start simple. Too many people fail because they first jump into a tool and then find that the tool doesn’t meet their needs. When starting GTD, follow David’s advise and start with pen, paper, and notecards.

I am so glad I started there because when I was ready to digitize, I looked for tools that met my needs and not for tools that forced me into a process I didn’t like.

Let me know what you think about the The Power of Less!

Honestly, trying-out the GTD apps (Omnifocus and Things) have kept me from buying into the system. Those apps seem needlessly complex and, in some ways, counterintuitive. Maybe if I actually read Allen’s book, I’d feel differently. In any case I ordered “The Power of Less” from Amazon based on your recommendation and should be receiving it this week.

Thanks
-Dave