Want an easy way to both stand out and convey some confidence? If you’r wearing a button-up shirt without a tie. Undo the top two buttons instead of just one. It will make you look less stiff and it’s a good way to show off some chest hair. You should have chest hair.
Exhibit A: Only one button undone. Looks Herbly and stiff.
Exhibit B: Two buttons undone. Looks more rakish and masculine.
This only works if you’re wearing the right undershirt. These include wife beaters, tanks and V-necks. A regular crew neck underneath will just look dorky.
I don’t recommend undoing more than the top two unless it’s summer and you’re in an appropriate environment. Too much chest falls into fashionista rather than stylish man.