Graham Fitch, a pianist and teacher in London UK, has a blog called "Practising the Piano" at http://www.practisingthepiano.com/blog/.
With over 100 free postings about various techniques, stumbling blocks, advice, and resources, it's definitely worth bookmarking.
Fitch also contributes to Pianist magazine (https://www.pianistmagazine.com/), which is a resource that some of our piano group members recommend.
