I purchased Effective Aperture Workflow many months ago and enjoyed it immensely, but more importantly, I learned a lot from it. Scott goes through his workflow in a lot of detail and believe me, it's a good workflow. I've adapted many things from the book into my own.
The book is available in the iBookstore and includes a bunch of video where Scott shows you as he explains. It's only $6.99.
Last week Scott updated it with new content and I'm going through it again.
The Art Of The Timelapse by Michael Shainblum
Greg McKeown on Essentialism: The Disciplined Pursuit of Less
I often fall for this. Sometimes I try to do way too many things and end up finishing none. Or the ones I finish are half-assed because I had to split my time and attention on too many non-essential things. The worst is, as Greg McKeown explains in the video below, when you do something that's successful and that opens a lot of new doors and you try to go through all of them. Success can bring failure indeed.