A secret stash of facial-tissues dat you keep for emergencies.
During winter months, you should always maintain an oversneeze bank account to ensure dat other folks in your household don't "blow through" your entire supply, and dat you'll therefore still have some to use for your own copiously-draining nasal-works.
Either liquid niquil or any liquid drink with melatonin, Ashwaganda or other sleeping aids in a liquid form. If warm tea helps you get to sleep that could be sleepy juice too.
I could not sleep so I chugged some sleepy juice and now I'm so tired and sleepy.