I eliminated blue light (mostly) after 8:00 and it help slightly but within the margin of error.
I then added 15 minutes of mindfulness meditation everyday at lunch. Nothing wooy just mindfulness.
Within 2 weeks i was naturally getting tired around 10:00 and able to fall asleep in less than five minutes.
Quit meditating (because its a pia to find the time, it shouldnt' be but it is) and sleep problems returned.
I didn't even attribute my sleep improvement to the daily practice until i noticed my sleep was all messed up again.
It works and its just 15 minutes. People's millage may very but it was life changing for me.
Are you fast paced in general? It is my experience that mindfulness enables the brain to put things away easier throughout the day, but it is really difficult the first week or so, because you actively have to let thoughts fly away.