A significant part of my understanding of econometric concepts stems from the wonderful site of xkcd.com. Thank you, Randall Munroe!
Other good ones on econometrics are about
blind trials,
survivorship bias,
selection effects,
a clickbait-corrected p-value,
negative results,
curve-fitting methods,
error bars,
error types,
confidence band width,
flawed data,
slope hypothesis testing,
confounding variables,
data generation,
change in slope, and
methodology trials.
You learn about economics and real science in
economics peer review,
modelling studies,
scientific paper types,
false dichotomies,
Taylor series, and
significance in a wider sense.
Finally, some fine ones on coding are about
automation,
code quality,
software development, and
code lifespan.