How to take ID Card photos correctly

The visuals below should be easy to understand. They are taken from the Schengen Visa Rules documents.

1. How much face should be seen
   
2. What should be the background
   
3. What about Brightness
   
4. What about Contrast
   
5. What about Quality of picture
   
6. Where should I be looking
   >
7. What should be my expression
   >
8. Can I wear Glasses or Headwear