How should we think about thinking? In this sequence I outline an epistemology called meta-rationality, which in my opinion corrects a number of the mistakes of existing epistemologies. The key contention of the sequence is that we should think about thinking primarily in terms of "frames of thought" and the interactions between them. The first half-dozen posts, which focus on introducing meta-rationality, constitute the first half of the sequence, and will be posted over the next month; the second half of the sequence focuses on more complex aspects of meta-rationality, and will be posted over the following month or two.