Method 1: Comforting voices
For me, shizuka rin and Miia humming in the monmosu ONAs are great examples of those, put me to sleep right away
Put my mind at peace and let the thoughts drift me away
If my mind's not at peace I'll watch some anime or do something I love,
If my mind is at peace, I'll lie in bed, get lost in thoughts and drift, I have certain pieces of imagery that I associate with comfort, such as nymphs, even counting things can help.