There are many documents on machine learning at Google as well as externally.
Machine Learning Crash Course: an introduction to applied machine learning(Dead link)- Machine Learning: A Probabilistic Approach by Kevin Murphy for an understanding of the field of machine learning
- Practical Advice for the Analysis of Large, Complex Data Sets: a data science approach to thinking about data sets.
- Deep Learning by Ian Goodfellow et al for learning nonlinear models
- Google paper on technical debt, which has a lot of general advice.
- Tensorflow Documentation