I have just finished reading The Power of Meditation by Sharon Salzberg. One of the most interesting ideas in it was that meditation practice is not so much about achieving perfect tranquility or concentration but is teaching you to begin again. Each time your thoughts drift away from your breath you simply begin again and don't beat yourself up about losing focus.
It occurs to me this Monday morning that this applies to so much of life, work, relationships and health. We set off on all sorts of endeavours with good intentions but often we falter, things go wrong, plans get sidetracked and we give ourselves a hard time about being failures.
Learning to calmly think "Oh well" and pick yourself up and start again, over and over and over, seems like a worthwhile skill to develop.