If your tickets are our RapidScan barcoded ones, all you need to do is show these on your phone. You can print these off if you wish, but it's not required.
If your tickets are physical and have been sent to you in the post, just simply take them along. Obvious we know, but don't forget!
Apart from that, just have a great time.
Note: some events may also require ID at the door, you can find out more about this here.