There is nothing more useful than learning what to forget. At least I manage myself for rapidly reshaping my mind to fit the tasks of the year. Despite my postings here, the gcc options for gcc 2.72 don't help much compared to my curre t muscle memory for terraform.
the problem I have with services like Blinkist (or any book summarizing offering) is that you get what the summarizers think is the "point(s)" of the material
You can read, for example, a Christian Apologetics work and come away with tools for public speaking and rhetoric that would be completely missed if you only got the "summary" of the apologetic argument in the religious context