While writing the above, it dawned on me, in spite of being a voracious seeker of and absorber of new ideas, how rarely I can put my head on the pillow and actually say, "I really had my mind stretched today." Or: "Holy s^#*, I can't believe ..."
Many of us have been convinced of the value of physical stretching regimens. But what about the mental equivalent?
We may, especially in Web World, come across "new stuff" in the course of a day. But what about truly weird stuff, genuinely surprising stuff, counterintuitive stuff that we take the time to absorb?
If you go to bed three days in a row without some genuinely new ideas wandering around in your brain—well, I suggest that you let that worry you.
(And then act with some haste upon your very appropriate concern.)