The principal activities you list in your Business Model Canvas should cover how you will fulfill your value proposition, reach your customer segments and maintain productive customer relationships while generating revenue.
This is where the rubber meets the road. There are three basic categories for this section:
Production: This covers the design, manufacture and delivery of a product in significant quantity and quality.
Problem solving: Finding new solutions to individual problems that are faced by customers.
Platform/network: Creating and maintaining a platform that can support partner or third-party products or services.