It has been said by many a Zen master that a Zen practitioner needs to be willing to practice zazen for 1000 in search of enlightenment.
Being mindful of all my activity during the day, is the extension of my Zen into daily activity, yet there is a lot of past conditioning to bring up into my awareness. It is in the last 10 years or so that I have recognized the wisdom of the "1000 years" of zazen statement. And now that my Zen practice has reached the 30-year mark it continues. It is the journey, not the destination, so I really need to learn to stop counting the years. That time is an illusion!