Here I am going to outline the processes for getting all the Brewfest Achievements on the Horde side. I am fairly sure that for the most part the ally side will be much the same. The only discernible difference will be with the Drunken Stupor achievement and I will describe the best place to get that when I get to that Achievement.
So here we are again, the leaves are changing colours, nights are drawing in and our beloved Brewfest Festival is here again! Starting up a great list of Autumn/Winter world events, everyone on Azeroth is getting very drunk, riding around on strange rams and jumping from the top of high places while smashed beyond belief. The Dark Iron Dwarves are up to their usual beer stealing tricks and Coren Direbrew is behind the scenes encouraging all sorts of drunken debauchery!