Work is more than work. Work is a way of creating and contributing; It is giving to the world; it is sacramental, because It is serving. It is a yielding up and a showing, WHATEVER it is you did — The best-made bed, the best-written book, the best piece of pottery you had within you. It is good for the psyche and good for the soul.
If the heart wanders or is distracted, bring it back to the point quite gently -- and even if you do nothing during the whole of your prayer but bring your heart back, though it went away every time you brought it back, your time would be very well employed.