Practise some git fundamentals.
Learn the many ways R sees objects.
Fundamentals of functions.
Tools to fix errors and test conditions.
Iterate through elements and give our function superpowers.
Learn the apply family of functions.
Harvest the internet.
Learn some RegEx interactively!
Learn to parallelize R code.
Extract data from PDFs.
Learn to navigate the shell by playing a game!
Log in and use remote machines!
Use git/GitHub for Projects.
Write the help files of your dreams.
Classes and Methods in R.
Check yourself (and your code).
Gotta go fast.
Tell the story of your package.
Showcase your Work on the world wide web.