The two most famouse bagel places in Montreal are
- St. Viateur Bagels -
http://www.stviateurbagel.com
- Fairmount Bagel -
http://www.fairmountbagel.com/
As far as Montreal Smoked Meat is concerned, you might as well go to the landmark
-
http://www.schwartzsdeli.com/index_eng.html
Hightheif is correct, Decarie Hotdogs has got to be the best steamie, however, if you are going to be downtown you may not want to head all the way out there (even if it is an easy metro ride)
If you are going to be in Montreal this weekend the thing to do is the Just For Laughs festival (
http://www.hahaha.com/), there is not question about it. That alone will provide enough entertainment for the weekend.
Go here for the public transit maps
http://www.stm.info/English/info/a-plans.htm