Well, this was something my bodyguard-instructor tought me, which has prooven to actually help me ALLOT! just keep your head up high.
Why does guys from the army often look intimmedating and in many girls eyes, sexy? because they're used to wearing a heavy helm that makes their neck REALLY strong, and makes them raise their head abit. it's a demonstration of an alpha male.

It's basicly the same technuiqe that models use on the catwalk. this also helps allot when you're ordering something in a busy bar. my friends are so shocked everytime I order something, because the bartender always comes to me rather fast. I just hook my eyes into him/her, and keep my head high. you can always "feel" when someone are looking straight into your eyes.

What I did to improve my neck-structure, was to raise the computer- and TV screen. It helped me allot tbh