About five years ago, after years of not sleeping well, I developed chronic insomnia. Like thousands of people afflicted with the inability to do what should come naturally – falling asleep easily, sleeping deeply and waking up refreshed – I was desperate and had no idea of where to turn to get help, or how I could begin to crawl myself out of this grey, lifeless and perennially tired world I had found myself in, or the unrelenting daily cycle of despair, anxiety and obsession that severe sleep deprivation brings.