The people around you are very important. Important in the sense that they change who you are. If you take a look at the closest 5 people that you spend the most time with, you will notice that you carry some of their qualities.
It may be a good thing or a bad thing but noticing them is a start. If someone is overly negative, you may become overly negative or if someone is an angry person, you may become an angry person. So be careful who you hang out with because they can plant bad behaviors in us.
It is always a good thing to associate with people that you aspire to be, those people who are at the next level of what you want to be doing. This will bring you up as a person and you will learn many new things from them. It will also bring you closer to your goals.
Use this as an advantage in everything that you do. Hang out with only those people which hold admirable traits. If you want to get stronger, hang out with strong people. If you want to be fearless, hang around with a bunch of leaders. If you want to learn something, go to the people who can teach you.
Never hang around the same old crowd because it will get you nowhere in life. Associate with many different people from many different backgrounds because they all have a lot to teach. Just make sure that they have the traits that you are looking for.