Stop staring at screens until the moment you want to be asleep. You need to wind down before bed.
A warm but not hot bath will help your body to reach a temperature that is ideal for rest, and cause you to drift off soon after you slip into bed.
Stressful thoughts keeping you awake? Write a to-do list for the next day to organise your thoughts.
This will clear your mind of any distractions and let you relax in peace without worrying you will forget something.
Switch off Netflix and pick up a good book, or listen to a radio or a podcast.
These will all relax your mind by distracting it from all the worries you have.