Mama always said you'd regret slouching one day, and while you've still got a few decades left before ultimately determining whether the sage-like advice was right or wrong, why take chances? The iPosture does the same thing as wearable posture reminders that we've seen in the past, but this one does so in a much more discrete fashion. The diminutive nano-sensor detects when your angle deviates just three degrees from the optimal position for greater than a minute, after which it emits a warning to straighten you out. Users insistent on keeping it crooked can turn the device off by powering it down, removing it or flinging it furiously into a wall. Life's next big nuisance will be shipping soon for $99.95.