If you are relatively new to Windows Store app development, you may find useful the resources listed below. This set of resources touches many key areas that developers will need to work with while developing Windows Store apps. 

Image of app through planning phases

Writing code for Windows Store apps (JavaScript)

Creating a UI

Defining app resources

Responding to user interaction

Working with data and files

Connecting to networks and web services

Managing user info

Launching, resuming and multitasking

Adding multimedia

Integrating devices, printers, and sensors

Creating Windows Runtime Components

Globalizing your app