Melatonin, magnesium, dl-phenylalanine, l-theanine, gaba. Get a white noise machine. Also get a diffuser and pure lavendar oil meant for the diffuser. They are cheap and if you turn it on an hour before bed and let it run all night it will make your entire bedroom smell like lavender which helps relax you and helps you sleep. Of you don't want a diffuser, you can buy the lavender oil and put it on your pillow. Don't look at an electronic screen of any kind an hour before bed. It will interfere with your sleep. Most new phones have a setting you can put the phone on so the type of light is not disruptive to sleep, but not sure I trust it. Make the bedroom a place for sleep, notfor working or watching tv etc. Breathing techniques are good and so is the "flexing" technique while breathing. Basically you start at your toes and very slowly and lightly flex and then release muscle group as you work from your toes all the way uo your body. Pretty much things everyone else said but these are what I found helps.