Mann, of 43Folders fame, in a recent interview with Matt Haughey, of MetaFilter fame (who is subbing for Gina Trapani, of Lifehacker fame)... uh, where was I?
Mann says he's been working on practicing mindfulness: "the practice whereby a person is intentionally aware of his or her thoughts and actions in the present moment, non-judgmentally."
This practice of being "in the moment" is applied in everything from Buddhism to yoga to dialectical behavior therapy.
I think I achieve it naturally when I'm on vacation -- but I've been working on being more mindful on a daily basis too.