It is no secret that I struggle to get to sleep at night. Since I was a teenager I have suffered from bouts of insomnia which mean I could literally watch the clock go round at night rather than drifting off to the land of nod. I find it difficult to switch off at night, always thinking of what I need to do the next day, and I often have my best ideas in those twilight hours, and then worry I will forget them when I eventually go to sleep. It all adds up to me not getting anywhere near enough sleep, and then feeling sluggish and tired the next…