Once time is a resource to be used, you start to feel pressure to use it well, and to berate yourself when you feel you’ve wasted it. When you’re faced with too many demands, it’s easy to assume that the only answer must be to make better use of time, by becoming more efficient, driving yourself harder, or working for longer instead of asking whether the demands themselves might be unreasonable. … And it becomes a lot more intuitive to project your thoughts about your life into an imagined future, leaving you anxiously wondering if things will unfold as you want them to. Soon, your sense of self-worth gets completely bound up with how you’re using time: it stops being merely the water in which you swim and turns into something you feel you need to dominate or control, if you’re to avoid feeling guilty, panicked or overwhelmed.

– from Four Thousand Weeks: Time Management for Mortals by Oliver Burkeman

I’m only through the first chapter but I can tell this is going to be a corker.