Readme Best Practices section needs explanations

[feinstein]

I like the Best Practices section of the Readme, as it gives guidance to less experienced devs, but it just throws the best practices without giving an actual explanation or reason behind them.

An article could be linked or further explanations and reasoning should be added.

[matuella]

Definitely! Code-examples with GOOD/BAD comparisons would be really nice (just like the examples that explains the mockito's API).