Maybe the most essential state for a writer, among the several states we might beneficently inhabit, is to be immersed in the language, and you know you’re doing it right when you dream in texts, or start encountering a lot of weird coincidences, where say for example you are writing a short story while in a meeting, or while listening to a YouTube video, and someone says a word just as you’re writing or revising it (sometimes a divided consciousness serves as affirmation of its unity).
So here are four text-and-type related things to check-out, at your letterholic leisure
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Profile of Jonathan Hoeffler and Tobias Frere-Jones, the best type designers in America, and stars of Helvetica (which you should watch, if you haven’t) win an AIGA medal and get this profile.
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Why X is used as a placeholder for an unknown variable
The idea: Look at the history, shape and sound pattern of each letter, sum it up in 140 characters, and collect a beautiful specimen for each letter.
My favorite: 
*A history of typography, done in paper animation