Step 1: Chill a double rocks or old-fashioned glass.
Step 2: Pour gin, Campari and vermouth into a mixing glass or cocktail shaker. Add enough ice to come above the liquid. Stir until the mixing glass or shaker feels ice cold, 30 to 45 seconds.
Step 3: Place large cube in chilled glass. Strain drink into glass. Pinch orange twist to release oils and drop in glass.
Read Eric Vellend’s tips for the mastering the negroni in his blog post.