How many times have you thought of something crucial to do and then forgotten it completely? That's why people invented lists. And very useful they are too. If, and only if, they are used effectively. Put thirty things on a list, and it becomes too daunting. Put three things on, and there's no point in having a list. And so we have refined the art of list writing to allow for about ten or twenty things to do. But in truth, most lists...