I pray.
Usually when you cant sleep is because your brain is all messed up, still active, there is energy left.
I pray, is a meditation state that relaxed the mind.
You give thanx to God for what you have, for your day, your house, even the problems you are facing because those are learning experiences.
Then... you surrender to God "I am here, take me, I am your child, do what ever you please with me, I surrender, I am yours".
Then... you ask for guidance, for clues. God, give me tips, send me clues, help me to listen to them. Help me to resolve the issues in my mind, you know what to do, help me to be better, guide me.
And that's basically is.
Let your mind be free of worries, give them up to God and you will feel relaxed and happy.
When in bed, protect yourself spiritually. Start to visualize a white light coming from above trough you to protect you, feel the protection, make it healing you.. ZZzzzzzzzz.... You are gone!
That is how I fall to sleep. Do it every night and it works better every time. Is healthy and in the morning you feel great. I am 37, I started to do that this year and my anxiety is basically gone and I feel great.