I’ve confessed before that for someone who is making a career out of helping organisations to change, I don’t half make heavy weather of it sometimes in my own life. I love the present hard, while taxing it with all my anxiety around the future to come. I’m like my littlest boy who loves holidays so much that he starts fretting from day two about how sad he’ll feel when it’s over. Years and years ago, when our children were babies and dark winter afternoons felt interminable and hair-tearingly boring, even as everyone told us to treasure them, a dear friend gave me the simplest, most game-changing gift. She used…