I love that there are so many excellent podcasts in Economics now. I also hate that there are so many and I can't keep up! Here are a few that I frequently listen to (Disclaimer: I've not heard all the episodes in all of these)

• My favorite podcasts
• Hidden Curriculum
• Probable Causation
• Freakonomics Radio
• Development Drum
• Think like an Economist
• Anything but Dismal

• Writing
• Elements of Style by Strunk and White
• Writing Tips for PhD students by John Cohcrane
• Intro, middle and end formulas
• Four Steps to an Applied Micro Paper
• Ten Rules for Writing your Job Market Paper

• Presentation
• How to make academic presentations
• How to give an applied micro talk
• Public speaking for Economists

• Job Market Resources
• The Professor Is In
• The Academic Job Search Handbook
• John Cawley's Job Market Guide
• Referring - coming soon!

For undergraduate courses, using media is often helpful to both explain concepts and keep the students interested. Here are some fun ones that I like:

• Derek Mateer
• Economics Media Library. Check out the Simpsons if you are a fan!
• The Economics Guy
• Econimate
• Voxdev Videos & Talks for development topics

I love Stata and remain a loyal user! Having said that, I think it's always fun to learn new tools. Here are some sources that have helped me learn R (I will soon update this list with resources for ML and Data Science)

• R for Data Science
• Andrew Heiss for data visualization (and more) using R
• GPL workshops - great for getting started. This is how I started learning R
• R cheat sheets
• Stata Translation to R by John Ricco and R for Stata Users
• Econometrics with R
• Interactive R course