At WSU, I've been stashing all sorts of tutorials, quick-and-dirty guides, and half-baked explorations—everything I’ve picked up (or tripped over) while doing research and teaching in the doctoral program. It's a not-so-comprehensive 'garden,' inspired by Maggie Appleton's website.
For pragmatic empirical research, statistical methods, and general sanity checks while working on my own, I happily reference the folks at tidyfinance, Mike Nguyen's bookdown page, or anything from Freda Song Dreschler.