We took the kids to the science museum today. As we boarded the tube at Archway, I started to do what I always do when I hit the London underground: try and deflect the onslaught of adverts that are taking up every freely available space on the walls so that ones gaze is not free to wander without falling on one. The constant interruptions to my reverie particularly pissed me off today as I noticed how each one kick-started a thought pattern that made me uneasy and in very subtle ways made me feel that my life was lacking in some way.  I became conscious that I couldn’t afford to take that city break to Istanbul or take my kids to see Cirque du Soleil and that I didn’t have time to read that latest book release or see that film when all I wanted to do was tune into the…