Rule #6 Remember to repeat. • Most memories disappear within minutes, but those that survive the fragile period strengthen with time. • Long-term memories are formed in a two-way conversation between the hippocampus and the cortex, until the hippocampus breaks the connection and the memory is fixed in the cortex—which can take years. • Our brains give us only an approximate view of reality, because they mix new knowledge with past memories and store them together as one. • The way to make long-term memory more reliable is to incorporate new information gradually and repeat it in timed intervals.

— Brain Rules by John Medina