Is your bedroom a sanctuary? A calming space without major distractions. No clutter, trash or junk? Make it neat. Keep it clean. Well ventilated and quiet. Provide reading material by the bedside. Soothing, low volume music. Dark with low level task lighting. Set yourself up for success. Keep the bedtime schedule NO MATTER WHAT. If you can't sleep, read, until you fall asleep. Give yourself plenty of time to allow this to work.

Navy sleep technique: https://www.youtube.com/watch?v=wZ7N7ngLu1A