Here are a few external resources that can be useful to you
Canada 411 : to find a phone number (don't forget to verify if the prospect you want to call is on the Do not call list)
Yellow pages : to find services or businesses nearby
Municipalities directory (french) : to get information on each municipal organization in the province of Quebec
Canada post : to help you in your mailing campaign
Quebec Land Register (french) : to find information on properties in Quebec
Enterprise Register : to learn more about enterprises involved in a real estate transaction
Infolot (french) : to find a lot number for you search in the Quebec Land Register