He mentions that emails often end up occupying your mind for 30 minutes after reading them. If you're distracted and mulling over some problem that came from an

He mentions that emails often end up occupying your mind for 30 minutes after reading them. If you're distracted and mulling over some problem that came from an email, you're not fully present. I'm sure many have noticed this effect from reading email or news before bed. Often if I've been surfing or reading email too close to bedtime, the interesting issues and problems I've read about keep me awake for a long time.