Windows Phone Resources for developers: 
- Design
 http://aka.ms/wp8devdesign

- Develop 
http://aka.ms/wp8devdoc

- Test
 http://aka.ms/wp8testing

- Publish
 http://aka.ms/wp8publishing

- Samples
 http://aka.ms/wp8samples


Trainings:
- Absolute Beginners
 http://wpdev.ms/beginvids


- Jump Start 
http://aka.ms/wp8js

- Design Boot Camp
 http://aka.ms/wp8designbootcamp

- Training Kit
 http://aka.ms/wp8hol

- Samples:
 http://aka.ms/zqgnx3
 

Happy Coding :)