This article reminds me of a TED talk I liked by Barry Schwartz on "The Paradox of Choice."

http://www.youtube.com/watch?v=VO6XEQIsCoM

The speaker argues that that freedom and choice are held as unassailable virtues by Western cultures, but in fact research shows that too much choice leads to unhappiness.

If you think of mind wandering as perhaps a product of too much choice for the mind, the two ideas are complementary.