When I 1st started trading full time I thought .. this is great I can drink during the week ... but soon after realised it set dangerous precedent (apart from the risk of becoming an alco) in that when you needed to be sharp with your trades you weren't if you were a bit too relaxed/ carefree ... hence it became "Costly" with 1 too many beers costing $1000's ... so rule is ... no grog during trading hours.
