What can I do at the airport tomorrow

Same thing you're doing now

I bring a book, I eat at the restaurants, I might have a beer, I work a crossword puzzle, and I even sometimes get into conversations with others who are waiting.

Walk around the nearby eateries and look for a coffee shop or a snack and enjoy. :)

talk to strangers via yik yak.
have a snack
drink all the overpriced alcohol you can find.

Not use the airport wifi unless you have a VPN

Find a charger, charge up your electronics.

Suffocate in your mask

Pray for SW.

Wait

knit