I have heard you just have to get to the gates really early (about 6/7am) and then when the gates open you just have to run as fast as you can and they let about 20 people through into the golden circle.
I got Golden circle tickets last year =D =D But my Boyfriend got them for us!
You can win them on the show nearer the time or by entering competitions online. If you are also very lucky and are at the front of the queue they will let in about 100 people - but you have to be there early!!! and usually its all the local people who get them as they can be there as early as they like!
I live local - and even though I already had the golden circle tickets loads of people from around where I live managed to get in just from queueing early!
tbh.. T4 is ages away.. there is nothing you can do about it now! lol