One of the best parts of Diego Casa's job is to stand on a corner in New York or Chicago with a coffee and just watch the crowd go by. He pays special attention to the men and their apparel, and makes a mental note about what trends are on the up. Chances are, in the future, he'll be making them for customers in his store, Rosso’s Bespoke. "We tailor-make suits, shirts and slacks so we need to know what's fashionable," he says. "I read men’s lifestyle magazines and watch the awards shows to keep up with fashion trends. I’m not really an awards show guy, but clients sometimes ask me if I can make something one of the stars wore so I tune in for ideas.”