Summarize the following:
This is important if there is an emergency or if you and your friends get split up. Use the phone to call each other. Use your usual toiletries. Bring a small bag if possible. If you have a big bag it can get in people's way and it can weigh you down if you are in the standing area or waiting for the gates to open. All you need is money, phone, a snack, your travel card and the tickets. You will be going to the concert until late at night and it is good to eat something. The concert will last until late at night and having food in your stomach means that you won't be likely to feel sick in the middle of the concert. Food at the venue is really expensive so it is ideal you go somewhere to get something to eat.

Summary:
Charge your phone. Have a nice refreshing shower. Pack the essentials. Eat breakfast.