Combine all of the ingredients in your cocktail shaker
Add the ice into your shaker
Shake until chilled...then shake for a few more seconds. The Last Word is a very rich cocktail that's a little more on the sweet side than most spirit-forward drinks, and so I prefer mine slightly thinner than usual. I've also seen some people add a dash or two of water to theirs, but I find the drink to be even better at the lower temperature resulting from the extra shaking.
Strain the mixture into a coup or martini glass (double-straining is recommended if you did not strain your lime juice first).
Optionally, garnish with a lime wheel, lime wedge, a Luxardo Maraschino or brandied cherry, or serve it sans-garnish. The Last Word is one of only a select few drinks that I personally prefer to serve naked (without garnish).