Taking you to a shop
Contoured blackout sleep mask
Light in the second half of the night makes it far harder to fall back asleep after a 3am waking. Removing it is cheap and immediate.
Affiliate accounts are not connected yet. These links go to the shops untagged, so nothing is earned on them. Amazon Associates requires three qualifying sales within 180 days of applying, so the tag is set as an environment variable once the account exists rather than written into the site.