Hopefully, you’re already able to discern which of these images is the TO DO and which is the NOT TO DO.
But there are plenty more tips that might not appear as obvious as these. For instance, dressing trendy is a NOT TO DO. Dressing conservatively professional is a TO DO. But there are also exceptions to this. You’re not wearing a coat and tie to work for J.J. Abrams. You’d still dress professional, but a more casually professional.