My firm's dress code is the same year-round: Fridays are always business-casual, and that's it. For those days, I've gotten some excellent ideas to add to my own from various pieces in Esquire and GQ on this topic. Esquire, in particular, did a piece on the "new office"- at the height of the Internet/casual dress boom, before the recent resurgence of the suit and tie- that I clipped and saved (and occasionally take a peek at), as it offers great ideas/combinations for business-casual that goes beyond the usual. If you're interested, Ambulance, I can dig it up and let you know more about that. When it comes to business-casual, there's lots of ways to be creative. The posts above reference some terrific ways to do that. I look at business casual not as a way to come into work sloppily dressed like so many others, but to stand out. I often try to wear something that could go from work to happy hour to dinner to wherever. That involves a "casual day" outfit that isn't just polo shirt and rumpled khakis. Last Friday, for example, I wore a slim, dark suit with flat front pants and material a bit different from the usual (wool and nylon) with a light blue checked french cuff shirt with nice cufflinks, open at the neck, with no t-shirt underneath. My belt was a bit different than usual as well, as were the shoes (side-zip ankle boots, as opposed to, say, wingtips). Around the office, without the jacket, it's a slightly dressed down look that, with a jacket, can go out on the town after work. Those are the types of looks that I think work great, but there are plenty of ways to experiment.