I've been enjoying reading Krupskaya's works on education and how to study (e.g. How Lenin Studied Marx). I'm wondering if there's anything similar in the Marxist canon (or just worth reading for Marxists in general) on the subject of study and self-education. I'll try to compile the Krupskaya I've been reading in an edit.
edit:
The Organization of Self Education
General Rules for Independent Study
Unfortunately that's all I could find online
In that case, I'll copy some comments over for you. The main posts were deleted, so you can't search for them. They could be helpful.