Lie in bed and just listen to the rain.
Make a surprise call to an old friend.
Engage in purposeful, stimulating conversation.
Spend the day at the beach -- any time.
Spend time with puppies, babies, and kittens.
Take that surprise road trip.
Go to a really good concert.
Bake homemade cookies for the entire office.
Treat yourself to a free day.
Learn something new and exciting.
Get lost in a great book.
Treat family to a really great night.
Buy a present -- just because.
Do that promised home improvement.
Have yourself a really good cry.
Finish that important project.