The single most important skill you will need is to figure out how to listen. Listen every word of what someone is saying to you, do not think about the answer you will give to them yet; after listening, think about it very carefully and take what you can take to better yourself. If you don't agree with what they say, or you have something to say in response, say it politely and clearly as you want to hear. Do not forget that adults, in general, have more life experience and knowledge than you had until that moment of your life, and they earned their experience in hard and painful ways, they suffered through the consequences of all the bad decisions you could have ever made in your entire life. So, they are valuable. Use them to be a wiser kid, that's how it works.