I, too, struggle with sleep sometimes. Reading doesn’t help, but I swear by sleep headphones, or I might watch something undemanding on tv until I nod off. Just beware if you do that - I once woke to shouts of ‘This is the police! You are surrounded!’ I was very disconcerted (to say the least!) but then realised that I had rolled onto the remote in my sleep
Do try sleep headphones though. You can play soothing sounds, music, stories, hypnosis- whatever works for you. Even if it doesn’t send you to sleep it is pleasanter to lie there relaxing than to fret about being awake.