Guys--don't forget the simple things! Ironed shirts and jeans/slacks, a nice watch, and a nice pair of clean shoes go a long way. This photo is a good example, just because you're wearing jeans doesn't mean you should be wearing your nikes ;)
Put This On - "A popover is a woven shirt with a placket that only goes partially down the chest. ... They’re more relaxed than a traditional shirt, but more dressed up than a polo shirt, and this in-between-ness makes them just right for when you want to look smart on casual days."