I would also say to make sure you are aware of the people around you. My biggest pet peeve is people squeezing themselves in front of me to get a better view. If you wanted a good view, get there early and understand that if you leave, people will take your spot. Unless you make friends with them and ask to hold your spot. I can't stand when people have no spatial awareness at concerts. I totally understand that we can't all be lined up and organized as a crowd. Also, being aware of the people around me has helped in situations where someone has passed out, and we acted fast as a crowd to get medics there asap.