Reading Hadley Wickham and Garret Grolemund's R for Data Science, how should we approach it?

Pontifications

R for Data Science website
Buy R for Data Science on Amazon.ca
Our approach at the moment at least for Chapter 1 (which may change ;-)) is to adapt the examples to a Mozilla dataset or instagram or flickr datavisualization t-shirt.
Anything else we should consider when reading it?