Take a bike tour of your city/town. Hit up your local library. Join a chess club at a coffee shop or bar. Read an old paper book from the public library by somebody like Agatha Christie, Charles Dickens, James Joyce, Fyodor Dostoyevsky, William Faulkner etc
Go for a walk in the woods and spook yourself out. Ride your bicycle – slowly around in circles generate some excitement (thanks Newton!). Watch an art documentary on Netflix! Fix your bike tire when it goes flat after you rode too fast (of course kidding – stay healthy with caution). Decorate your room with vintage postcards and prints once you feel bored again 😉 . Compliment one person today. Take a cooking class on how to cook your favorite dish.
Visit an art museum. Go for a walk in the park and take some photos of sculptures or trees/flowers/birds. On your way there, listen to music you like (or don’t like but are curious about anyway). Visit an old mill or planetarium or something that is run down and see if you can fix something.