Go back to bed. Sleep to my heart's content. Get up and catch up on all my reading and watching since there are no bills or obligations to worry about.
Or just go to the nearest animal shelter, gather all the fluffies, spoil them, find some way to keep them fed and cared for.
If nothing goes horribly wrong, like the world's nuclear plants all melt down like Chornobyl, then just explore the newly abandoned places before they become too arduous to, then hang out in nature and see what the animals get up to without people.