This is what George Costanza from Seinfeld meant when he emphatically insisted on having "Serenity now!"  Of course, he didn't get what he wanted.

Want to relax?  Take the edge off?  Has someone told you to "chill the (rhymes with duck) out" and you know they're right?

When (not if) you answer yes to any of these questions, have a Tranquilo.  I adapted this from a cocktail at the Sanctuary Cap Cana resort in Punta Cana, Dominican Republic, which is the site of many blissful moments for me and my far better half. 

2.25 ounces light rum
Juice from 1/4 lime
.75 ounces glorious grenadine

Combine in a shaker with ice, shake with the rhythm of rolling waves hitting the beach at sunset, and strain into a chilled cocktail glass.

The Tranquilo is a simple cocktail, so I guess in this instance simplicity equals serenity. You can use a gold or dark rum instead of light rum. Regardless of the rum you use, psychologically speaking the Tranquilo will get you to where you want to go.  Isn't that the point of cocktails?