I've always had trouble falling asleep properly. I got helped by the usual suspects like avoiding caffeine after 14-15, earplugs, thick curtains and light cove

I've always had trouble falling asleep properly. I got helped by the usual suspects like avoiding caffeine after 14-15, earplugs, thick curtains and light cover over the eyes as well as cool temperatures in the sleeping room, but the big improvement came after I stopped eating after 20 in the night, and preferably earlier than that.