To look like a modern gentleman at all times, rock a navy overcoat with a white check dress shirt. Infuse this outfit with an added touch of polish by finishing off with brown leather oxford shoes. Keep this combination in your head come warmer weather, and we promise you'll save a ton of time brainstorming for an outfit on more than one occasion. As a man in his 30s, you want to start dressing in a more elegant manner. In this case, looks like this are ideal as inspiration.