kaggle.com
A question I have read a few times on Facebook groups is something to the effect of, “Where do I find datasets to work with?”. A good answer to that question is Kaggle, a free website where people share datasets and code. Of course, this is not R-specific, but if you are at a loss for what to work on there is a good chance you will find something interesting on Kaggle. You can also join “Kaggle competitions” where people compete to create statistical models with the highest predictive accuracy.