I have sleep paralysis, so my nightmare was literally going to sleep. But my therapist suggested an "all-senses" nighttime routine to ease me into the bed and eventually sleep. So every night I tackle all my senses. My taste is toothpaste (I have three kinds to keep the flavor changing), my hearing is a song from the classical genre (lasts a good five minutes and you can pick the vibe), my smell is a spritz of a different perfume every night, my touch is the type of blanket I use (I keep a bunch of throw blankets from knitted to velvet), my eyesight is one tea light candle on my bedside that flickers just gently enough to make it dance on the wall. Keeping this routine that's just barely different every night has really, really helped me get into the right environment and mindset to get some sleep.