"We are the government and we are here to help you". In many cases this is actually true.
Civil Aviation Issues Reporting System
Report concerns or safety-related issues regarding Transport Canada's services or processes.
Air Transportation Statistics ECATS
Transport Canada is now collecting statistics on how we use our aircraft. This is something that has be desired by COPA for a long time. Participation is easy. View the PDF for instructions.
Index to the Canadian Air Regulations
Part 6, Subpart 2 covers operating and flight rules
Standard 625 covers aircraft equipment and maintenance.
Standard 625 Appendix A covers Elementary Work (not requiring a maintenance release by an AME)
If you cannot find something, try this CARs Reference Listing
Transport Canada Airworthiness Directives
Search for airworthiness directives based on the aircraft registration.
It is also a good idea to search the FAA Airworthiness Directives.
Note that only searching by aircraft may miss directives aimed at equipment. Also search based on the manufacturer of your avionics, carburettor, etc.
Canadian Aviation Daily Occurrence Reporting System - search reports of incidents and accidents.