Every coat has its place in your wardrobe, but to look expensive, go for a long coat over a short puffy one. The longer the better, but for sure at least get one that goes past the knee. It will make you look elegant and luxurious!
When everything is polished and fits you well, you look like someone that knows what they're doing and where they're going. A button-down or a blazer is a good place to start because those can be worn anywhere and in many different ways!
Every chic outfit seems to have a classic, structured bag. When aiming to look expensive, stay away from slouchy bags and backpacks. Instead, focus on black handbags with minimal hardware. Too much hardware can make your bag, and thus your whole outfit, look cheap!
It's funny how just going from a rounded toe to a pointy shoe changes an outfit. A pointy toe shows that you mean business and it adds that extra polish to an outfit!
Adding structure to an outfit will class it up. Feel free to go a step further and add a belt! A belt polishes it off, but don't go too crazy. Something small and classic is ideal.