I definitely recommend smartwool socks. They have a variety of styles to fit all types of activities, including business attire. They are fairly odor-resistant, don't cause blisters when damp, and are generally very comfortable in a wider temp range than cotton or many synthetics. They can be ordered from smartwool.com, REI or any number of other online sites and can be found at most outdoor stores in addition to some other sporting goods and department stores.