Jon Kabat-Zinn, mindfulness expert and author of "Wherever You Go, There You Are," on staying in the present:

“It is all too easy to remain on something of a fog-enshrouded, slippery slope right into our graves; or, in the fog-dispelling clarity which on occasion precedes the moment of death, to wake up and realize that what we had thought all those years about how life was to be lived and what was important were at best unexamined half-truths based on fear or ignorance, only our own life-limiting ideas, and not the truth or the way our life had to be at all.”