Have you ever sat down to relax, only to find that you can't quite settle? Perhaps you make a cup of tea, sit on the sofa or finally get into bed, but your mind starts listing everything you haven't done. You remember the washing, the emails, the job you need to finish or the person you haven't replied to. You might feel restless, guilty or uncomfortable doing nothing, so you get up and find something else to do. Even when you're exhausted, resting doesn't necessarily feel re