I've found doing the 4-7-8 breathe popularized by Dr Weil as soon as I lay down at night helps my mind incrementally relax right away and then continue to lead towards my mind slowing down. I've practiced it for stretches of time in the past and ended up stopping. This time I'm going to do the breath as soon as I'm ready to rest in bed so that it becomes part of my routine. https://www.youtube.com/watch?v=p8fjYPC-k2k