How often do you work out?
I find I sleep much easier on days I work out compared to days I don't
Do you drink caffeine?
I realized that I was drinking caffeine too late and it was affecting my sleep..I love soda but I made a rule, no caffeine after 9pm. I've also chosen to drink more caffeine free soda
Have you tried a fan or ambient noise machine?
These are a huge help for me
Do you read before bed?
I find reading a chapter before bed relaxes me..if you already do, perhaps this activity is stimulating your brain too much before bed..
I would take a look at your daily activities and see what adjustments you can make...hope this helps