We're approaching the eye of the smart-wear storm – that weird time of year when every other week seems to feature a wedding, prom, graduation or summer party. So it's the perfect time to spruce up your formal gear, either with some ace new tailoring extras or maybe even an entirely new suit.

Snapped at the premiere of his new film Million Dollar Arm, the Mad Man himself, Jon Hamm, rocked a wicked cool three-piece suit. We wouldn't usually advise a black suit outside of a black-tie affair or a funeral, but this works with the waistcoat and beautiful knitted tie. If you want a pop of colour, a bright pocket square will set things off wonderfully. If it's good enough for Don...