I believe the answer is: 
- Establish and enforce strong property rights. 
(this would encourage people to establish businesses and generate wealth for the country)
 - Promote free trade by reducing or removing tariffs on imports from foreign countries. 
( this would make other country become interested to make an investment to their country)
 - Give inventors and authors exclusive, temporary rights to market and sell their creations.
(to encourage innovations that might be sold to other countries in order to obtain net GDP) 
 - Minimize corruption among government officials.
( so the money can be properly allocated for government welfares to help the citizens)