Reading for first time? Watch
I think the main thing to remember about Reading is it's a festival for 'young' people. That's not to say that there aren't any older people there but there's a lot of teenagers and it gets crowded and can be uncomfortable near the stages and even while walking around the campsite when it's busy. Stick with your friends, keep in contact, learn how to get around (very important - the campsite is f*cking massive), look after your welfare needs and on Monday you'll be real sore that it's all over.