Headspace is a course of guided mindfulness meditations delivered via an app:
Here is a link to the Invisible Gorilla selective awareness test from Daniel Simons and Christopher Chabris:
The website of Dr. Larry Rosen has many interesting articles, blog posts, and videos of speeches on the topic of attention, distraction, and the role of technology:
RescueTime automatically keeps track as you work on your computer and has time management software that provides a personal daily Focus Work goal: