Focus, by Leo Babauta

This e-book is available through Amazon (with additional content) or as a free download with just Mr Babauta's core materials.

The notion, in a nutshell:   spend less time on-line lest it be an addition that leads you and your family to suffer and gets in the way of your ability to think.

Some of this material makes great sense to me; some is what you'd expect from someone who's business model is simplicity.