Similar survey from WWD.http://sartoriallyinclined.blogspot....nk-factor.html
Bias here is that they only survey women in the "industry."
Summary: well-fitting pants, nice shoes, good bag, t-shirt, and stylish jacket. Above all, something with personality and lived in look - subtle and "effortless" so as to not look like you tried.
For what it's worth, my wife has made a point that I don't wear enough t-shirts. I countered that I wear one every day ... underneath my button ups.