For places to go or beer to drink? I go there once in a while.
Any of the Unibroue beers are good. St. Ambroise makes a nice pale ale that I quite like.
The only brew pub I've been to there was Brutopia. It's small but the beer was OK.
If you want to blow some serious money on somewhere to eat, cue de cheval is great but very pricey and of course there is pied de cochon if you want to try Martin Picard's over the top take on all things pork and fois gras.
You have to try the smoked meat. I've eaten as Swartz's Deli and it was great but I hear The Main is also good. And of course poutine. Must have poutine.
Edit: Remember, it's Canada so if you see Pale Ale or IPA, it may not be what you are used to in the US. For example, Keith's IPA is quite popular but tastes more like Bud than what most American craft beer drinkers would consider an IPA.