You catch yourself picturing a cabin in the woods mid-meeting, or rehearsing an argument from three years ago while washing dishes. Research suggests adults spend up to half their waking hours this way — and that daydreaming isn't a failure of focus but a fundamental feature of human cognition. This essay explores the neuroscience of the default mode network, why our minds wander toward the future, how daydreaming fuels creativity, and when it tips into something unhealthy.