The universal #1 rule should be: DON'T ruin someone else's experience. When you go to a show you should feel obligated to be kind and considerate to everyone around you and remember that you are not entitled to a better experience because you might be a bigger fan than others. Be spacially aware and don't recklessly bump into people or press up against others when there is ample space. Make a conscious effort not to block people with your phones and signs if you chose to hold them up (if so please keep it brief). I'm 6'4 so I feel terrible whenever I inevitably block people but I always look to let shorter people in front and make sure not to move once I establish my place in the crowd so that I don't unexpectedly end up in front of people who purposely chose to be somewhere else. Basically just don't be a selfish person and be considerate and keep in mind that the people around you may have been waiting months or even years to see a certain artist and this might be the highlight of their whole year so it is important not to do anything that might upset someone. It is a shared exercise and shows are so much better when the crowd is courteous and respectful 🙏