8 Surprise Reasons You're Still Tired

You're Overdosing on Caffeine in the A.M

Do you start every morning with a coffee mug the size of a soup bowl? This will certainly wake you up but will also set you up for an afternoon crash. Instead, try sipping smaller amounts throughout the day. Researchers at Harvard found that quarter- or half-cup doses can help give you a more consistent level of alertness, without the spikes and plunges.