A classic layered sheath dress is an easy way to get dressed for work in the mornings. Some mornings are more rough than others (like getting to work and realizing you forgot to put on the belt that goes with [and completes] your outfit).
Alas, I wanted to share this outfit, because I still think it works:
Last winter I wore this dress a little earlier in the year with tights and a layered turtleneck. See that look here. I think it would also look cute with a Tshirt under, or a blazer over. Versatility!