The best way is to focus on one industry or application (e-commerce, natural language, image recognition and so on) you are really passionate about and start pr

The best way is to focus on one industry or application (e-commerce, natural language, image recognition and so on) you are really passionate about and start practicing theory and models from there. Machine learning is a bag of tools, the most important point is still the business model asking for it, why and how: target, metrics, execution, validation, deployment.