Machine Learning Best Practices from Google: http://martin.zinkevich.org/rules_of_ml/rules_of_ml.pdf (PDF)
Operational impacts after you deploy a Machine Learning system: https://sites.google.com/site/wildml2016nips/SculleyPaper1.pdf?attredirects=0 (Using machine learning in real-world production systems) | https://research.google.com/pubs/pub43146.html (“Machine Learning: The High Interest Credit Card of Technical Debt”)
Machine Learning Crash Course 2015:
Discussion: https://news.ycombinator.com/item?id=13414776