Get a Good Pair of Sneakers

Is your energy lagging? Though it may be the last thing you feel like doing when you're tired, exercise -- even a brisk walk -- can be more effective than a nap or cup of coffee at fighting fatigue.

Sniff Rosemary

According to some research, catching a whiff of this aromatic herb may increase alertness and improve memory. To stay sharp, try smelling fresh rosemary or inhaling the scent of rosemary essential oil before a test or meeting.

Embrace Bitters

Combat a yen for sugar by following a Chinese medicine approach: Eat foods such as endive, radicchio, cooked greens, and olives.