These are blogs and web sites I highly recommend.
Statistics and research methods
Datamethods is a statistical discussion forum maintained by statistics professor Frank Harrell.
The homepage of Nicholas Tierney, which I met at the RStudio::conf2018 where he presented his R-packages for handling missing data. He is one of the guys behind R-miss-tastic, a resource website for missing data.
The homepage of Zad Chow, who writes about statistics, medicine and nutrition.
The logic of science is a blog focusing on critical thinking, scientific methods and logical fallacies.
The blog of Erik Arnesen, public health nutritionist and PhD student at the University of Oslo.