Sensory self-care is not indulgent. It is one of the simplest ways to tell your body that it is safe to rest. The senses bypass the thinking brain, which is exactly why they help on the days when thinking is the last thing you want to do more of.
Scent
Keep one familiar scent that means calm to you. A botanical balm on the temples, a candle by the bed, a few drops of essential oil on a tissue. Same scent, same place, every time.
Touch
Slow, deliberate touch matters. Massaging balm into your temples for a full minute is more useful than rushing through it in ten seconds. The slowness is the medicine.
Light
Bright overhead light keeps the body alert. From mid-evening, switch to lamps or candles. Your nervous system reads the change.
Sound
Quiet is underrated. Twenty minutes without speech, music or screens lets the system settle. If pure quiet feels uncomfortable, try soft instrumental music or natural sounds.