Put an orange slice in the bottom of a glass, add a bit of Really Simple Syrup*, and muddle (press the orange with the back of a fork). Pour in some bourbon, whiskey, or rye, add a few drops of bitters. Stir. Add ice. Serve. Forget the cherries unless you’re under 12.
*Really Simple Syrup: add equal amounts of sugar and water to a jar. Shake.