How to say "productive" in Mandarin and Cantonese? Google Translate says 生產的
If you want to say that someone is productive, as in your example, you are basically saying that they are very efficient, therefore 效率 is the best term. 
 


  你效率很高 you are very productive (efficient)


In your example: 先别拖延，你就可以提高（你的）效率。 

For inanimate objects, 生产力 (productive strength) is the way to go, only difference being in Chinese you are using it as a noun.


  中国的生产力很高 China is a very productive country