Fair and Warmer
What I've learned from the rum drinks I've had so far is that sweet vermouth is a better companion to rum than dry vermouth. Triple sec helps, too.
.75 oz sweet vermouth (Martini & Rossi)
1.5 oz Light Rum (Bacardi Silver)
.5 tsp Triple Sec (Potter's)
Stir with ice and strain into a chilled cocktail glass.
Note that I follow directions very poorly and shook this drink, hence the foam.