It's obvious really. Don't outdrive the car, yourself or the conditions.
I think some people get carried away. It's big circuit, could be wet in some places and not others etc. A lot of the corners look fairly stragit forward but it's still a narrow circuit with big curbs and off camber sections. Might be OK getting into one corner all speedy but when it comes to changing direction almost after it crops people up trying to brake whilse steering or just trying to carry the speed on the wrong line. Curbs can throw most cars off pretty easily too.
Just gotta go at a quieter time and build yourself up. I'd love to go if I ever have a car I'd enjoy driving around it but I wouldn't be thinking I could take it on flat out by any means. I'd enjoy exploring the limits mind you.