Mindfulness techniques before the bed have been found to help people all asleep. One way to practice mindfulness is to sit still in a comfortable position and quietly focus on your natural breathing. Become aware of your body as you breath, release any tension, and let any stressful thoughts slowly slip from your mind. Find more tips for meditation and mindfulness here.
The science: Mindfulness meditation has been shown to significantly reduce insomnia, fatigue, and depression (Black et al., 2015). This works by inducing a relaxation response and relieving stress, which for many people lies at the root of their insomnia.