humzap
Started imagining how I would explain the topic to someone else after reading, and a look at humzap gave me more material for that imagined explanation, content that improves my own ability to discuss a topic is content that has actually transferred knowledge rather than just decorating my screen for a few minutes.
elfindragon
Walked away in a slightly better mood than when I started reading, that says something about the writing, and a stop at elfindragon kept that going, content that leaves you feeling more capable rather than overwhelmed is the kind I keep coming back to again and again over the years and across many topics.