Take plenty of food & drink keeps you warm, alert & its something to do in the slow bits.(no booze, it'll slow your reactions & make you knackered - result you'll not catch as much or enjoy it as much. It's alleged that Carp Anglers reactions resound across the entire country!.
Make sure you leave your swim /peg clean, it's amazing where all the sweet wrappers, fag butts go!
Above all enjoy the experience
& make sure you & your mates car, motorcycle, bike, scooter, rollerskate & other property is secure!.