10 - The Brewfest Diet
10 - Brew of the Month
10 - Direbrewfest
10 - Down With the Dark Iron
10 - Does Your Wolpertinger Linger?
10 - Have Keg, Will Travel
10 - Strange Brew
10 - Disturbing the Peace
10 - Brew of the Year
Feat of Strength - A Brew-FAST Mount
I would suggest going for the Meta portions of this Holiday's achievement list if you're worried about missing it. Brewmaster is part of the overall Holiday Meta achievement What a Long, Strange Trip It's Been. Some people may want to go for non-meta achievements like Disturbing the Peace which requires you to wear 3 pieces of Brewfest getting smashed and dancing in Dalaran thinking they could return the clothing.
Last year you were able to return your clothing which is pretty expensive token wise but you cannot return it again this year. I repeat, you cannot return clothing for tokens. I say this because Blizzard removed that ability to return clothing last Midsummer's Fire Festival to prevent the same idea of tokens being used for multiple purchases and returns so plan on farming those tokens every day because they've done the same to the clothes for this holiday too. You can find the main Brewfest Hub's outside Orgrimmar for Horde and outside Ironforge for Alliance.
1. The Brewfest Diet
Description: This is one of the easier achievements. Go around to the cheese, bread, and sausage vendors at the Brewfest festivals and pick up the appropriate items. There are level requirements on the items so you may not be able to complete it until you are a higher level.
2. Brew of the Month
Description: This achievement requires you to get 200 tokens and purchase membership from the Token Vendor. It leads you into a quest to talk to the Brew of the Month Club. This enables you to begin collecting special brews in the mail once a month for the Brew of the Year achievement.
Description: Coren Direbrew is now in a LFD system like the SFK valentines day boss was. You can find the dungeon master in Orgrimmar or Ironforge. He still drops the same gear as last year (item level 200) but now drops a keg-shaped treasure chest giving you 2 frost badges. Good luck getting those rare brewfest mounts.
4. Down With The Dark Iron
Description: This quests becomes more difficult the longer you wait to complete it so go do it now! It's really easy at the beginning of the holiday because everyone is around your Brewfest hub. Eventually a timed event will pop up where dark iron dwarves will use mole machines to attack the festivities. You can stun them by throwing beer at them. It's loads of fun, but is hard when you're the only one there.
5. Does Your Wolpertinger Linger?
Description: Be sure to grab the Synthbrew Goggles from the npc who gives you the "Catch the Wild Wolpertinger" quest. Otherwise you may have difficulty ever seeing these guys, unless you're really really really drunk. *hic Just run around or mount up and use the nets given to you on Wolpertingers that you see running around. Catch 5, turn it in, and you've got yourself a cute and cuddly pet.
6. Have Keg, Will Travel
Description: If you're lucky enough to get a Brewfest Mount off of Direbrew then you'll gain this achievement. If you're an average joe like the rest of us you can buy some "Fresh Brewed Hops for 2 tokens and get the achievement that way.
These are not required for the Meta Achievement.
7. Strange Brew Strange Brew
Description: You can find these special brews from the different breweries' apprentices on the festival grounds.
8. Drunken Stupor
Description: This is pretty easy for Druids, Mages, and Paladins. For the rest of the classes, Shattrath is still the most popular place. Jumping off the Scryer rise to lower city while drunk will net you this achievement.
9. Disturbing the Peace
Description: I tested it and you cannot return clothes bought for tokens so I would suggest doing this one last as it doesn't count for the Meta. It requires 350 tokens to complete 3 pieces of the set.
10. Brew of the Year
Description: This achievement takes a whole twelve months to complete so you better get your Membership this year. You'll receive a special brew on the 1st of each month.
Bonus Feats. of Strength
11. A Brew-FAST Mount
Description: If you were lucky enough to win the Brewfast Kodo or Ram off Direbrew then you'll get this achievement.
This achievement is no longer obtainable this year for 2011. Although 2011's Stein is Purple there is no associated achievement for it.