After the you fill a Boston Shaker with ice, add a cherry to a cocktail glass. Pour in your whiskey (2 ounces per person), and then add some sweet Italian Vermouth (1 ounce each) and a dash or so of cherry juice. Shake and pour.
This is a great drink if you prefer a little sweeter manhattan. Otherwise lose the juice and add a bit more vermouth. Or for a perfect manhattan split it with dry vermouth.