A good posture.
I truly don’t need to dive deep into this one, yeah? It shouldn’t come as astonishment to you that nothing says better you are an alpha male, than having a decent Posture. It shows people around you that you feel certain about your own body. Those who feel shaky regularly have an unpleasant Posture. They are either too hardened or attempt to make themselves look as little as could be expected under the circumstances (by slouching). Keep your chest elevated and your shoulders back!