Sending packages within Canada and around the world through Canada Post may seem like a complicated process, but it is really quite easy. Normally it goes to the following 5 steps to finish sending process.
Step 1: Prepare and pack your package
Wrap or pack your package is the first step toward your success to finish sending process, please reference Canada Post recommendation or consulate with a Postal Outlet staff near you for perfect solution.  

Step 2: Address your package
Please reference Canada Post on How do I address letters and parcels? for details.

Step 3: Determine the RIGHT shipping service
There might be several shipping methods (of course, associated with different costs) may apply to your destination. Fox example:
Within Canada: Priority, Xpresspost, Regular Parcel and Expedited (with VentureOne card or Small Business card)   
Ship to  USA: Priority, Xpresspost, Expedited, Tracked Packet and Small Packet
Ship to International: Priority, XpresspostInternational Parcel, Tracked Packet and Small Packet
Please reference Canada Post website for more detailed information at: https://www.canadapost.ca/cpc/en/personal/sending/parcels.page?

Step 4: Calculate the price of shipping
Based on the weight and size of your package as well as the destination, there will be varying shipping costs. Please reference Canada Post website at: https://www.canadapost.ca/cpotools/apps/far/business/findARate?execution=e1s1, to calculate and compare postage prices for shipping and mailing in Canada and around the world.

Step 5: Ship the package
Once your package has been successfully accepted by Canada Post Outlet, keep your receipts for checking your package delivery information (service conditions may apply). 

Note: You may find related information from Canada Post website at: https://www.canadapost.ca/cpc/en/personal/sending.page