A popular rule of thumb is to shake the cocktail if it contains a citrus component, and to stir if there's not. Additionally, if the contains mostly, or is made up entirely of spirits (e.g., a Manhattan, Martini or Negroni), stirring is your best bet. If a cocktail's ingredients list features juice (e.g., a Margarita, Daiquiri or Cosmo), shaking is typically the norm. \r