Directed Thinking Activities
Write. Famed author Joan Didion says, "I don't know what I think until I try to write it down." Amazon CEO Jeff Bezos preaches the value of writing long form prose to clarify thinking. Unless you're a professional writer, writing is not always about the written output; it's about the thinking that happens as you attempt to communicate. Do not assume you have to share your writing with others for it to be time well spent.
Read a book. Don't read an executive summary or two-page cheat sheet. Read a full book. It's not about the content of what you're reading -- in most business books, there's not much new anyways -- it's about the quiet time you're spending by yourself. Unless you're a professional book reviewer, reading is not about reading; it's about thinking. It's about hearing yourself think.