How to be Smarter: Nervousness can make you seem less competent. When starting to feel nervous, touch something soft to calm your nervous. Your shirt collar or scarf works well.
How to be Prettier: Chewing gum after meals helps teeth stay whiter by preventing stains from accumulating. Extra points if its whitening gum and/or sugar-free.
How to be (less) Awkward: When you pick someone up from the airport or train station after they have been traveling to see you, the first thing you should do is give them a hug and offer to carry their bags. Even if they don't take you up on the offer, the symbolic measure of offering to carry their bags shows you appreciate the traveling they have done to see you.