(revised Oct 6,8)
You may know that November is NaNoWriMo, National Novel Writing Month, for those so inclined; according to this LA Times article, in 2009 it had 167,000 participants, of whom a little more than a fifth did finish their 50,000+ word novel.
I'm christening this October OctoLearnMo, for self study.
I intend to complete the 22-chapter Krugman/Wells Economics textbook, and David Archer's 23-lecture online "Climate Science 101" course. And should there be any time&neurons left over, I'll be working toward fluency in Python.
Progress report: almost a week in, 7 climate science lectures and 6 Econ chapters and within-chapter exercises, although not the Econ end-of-chapter problems or (yet) the climate science labs & quizzes.
For other courses see Class Central (EdX, Coursera, Udacity, etc.); and CompSci bottom-to-top exploration class Nand2Tetris looks interesting.