I have always been of two minds, though, when it comes to the "always on/always available" issue. On the one hand, I have come to rely on Wi-Fi in airports. It has given me the ability to quickly download my e-mail before boarding a plane, thereby making the flight much more productive.

On the other hand, I have resisted using a BlackBerry or similar device, even though colleagues have assured me that I will love it once I give it a try.

Here's the quandary: I already feel that I am in touch so much of the time. Am I really missing out by being out of touch while I walk from my car to the office, or in a taxi on the way to a hotel? Do people really need access to me when I'm in line at the grocery store?

There is some scientific evidence that my resistance to being "always on" is not just based on my own stubborn streak. Nobel Prize-winning behaviorist Herbert A. Simon revolutionized that field with his notion of bounded rationality. Bounded rationality states that the world is so large and complex, we don't have the capacity to understand everything. Simon theorized that the nature of the human mind actually limits our ability to be rational.

In other words, because of the great complexity around us, we make less-than-perfect decisions -- decisions that are bounded by our own inability to consider an infinite number of factors.