How to be Smarter: Pretty much the most surefire way to prevent getting what you want is to refuse to ask for it. How to be Prettier: I think you can build a whole beauty (and life) philosophy around the idea that nobody ever looks worse when they smile.
How to be (less) Awkward: It's not just parents that get annoyed when you text at the table. When you are having dinner with anyone, even someone your own age, phones are away. If there is something truly pressing you must check, either excuse yourself to go the restroom or ask your dinner partner if they mind if you take a quick peek at your phone.