1. Don't do the "invisible jacket" thing. If you're wearing shirt + tie, a jacket is not optional (if you want to look good).
2. Don't use the double Windsor knot. It will never look as good as a simple four in hand, or a half Windsor.
3. Don't wear your company key card when posting on a public forum, if you don't want to give away who you are.
4. Size down on the shirt.
5. If you're gonna wear it with chinos, go for a light blue shirt instead. There's a clear...