What can i do?
There are two approaches, one using habits and the other using medication.
I start with the natural ones:
Set times not only for sleeping but also for waking up.
Take a hot bath before bed.
Listening to relaxing music also helps.
Avoid caffeine, nicotine, alcohol and heavy meals hours before going to bed.
Do not sleep during the day.
Keep the room dark or wear a mask.
In summer a fan to circulate the air is mandatory.
Some people find over-the-counter teas and medication beneficial.