This Huffington Post article gives 10 tips for tackling insomnia informed by CBT theory. It's very simplified, but a nice introduction to the sorts of interventions that are helping thousands of people beat insomnia without resorting to sleeping pills.
The Mental Health Foundation found that nearly a third of Brits suffer from insomnia – and those are just the people who are desperate enough to speak to their GP . . . Over 10 million sleeping pill prescriptions are issued every year but does reaching for the pills really work or do they simply suppress the symptoms leaving the cause untouched? Non-drug therapies such as cognitive hypnotherapy (CBT) can help to re-establish natural sleeping patterns, ensuring a long lasting change without medication."