Blogger Scott Young suggests getting your personal education organised with a to-learn list. Young differentiates his to-learn list from a to-do list, claiming that to-learn lists can help you better organise your personal development by, for example, splitting up your interests.
If your self-education isn't organised, it is easy to pick your favourite subjects even if 90% of the book's material is old. Keeping a to-learn list allows you to explore subjects that are on the fringe of your current understanding.
Do you keep a to-learn list separate from your general to-dos? Let's hear how you keep track of and organize your personal education (and what's on your to-learn list) in the comments.