This is the book for learning causal techniques. If you want an introduction that is more concise, check out Kevin Grier's videos on some of these methods.
This might look "busy," but it is extremely helpful in learning the basics of STATA
I have found these tips extremely helpful, especially when you are first getting into writing.
Some of my favorite podcasts on economics include Economics Detective (an overview of some of the most recent literature), Freakanomics (great combination of weird, fun, and informative), Planet Money (short, sweet, and interesting!), Probable Causation (law and economics), and The Bob Murphy Show (great combination of economists and public figures). However, my favorite podcast is not economics-related at all: Malcolm Gladwell's Revisionist History.