Food and mood

Carbohydrates increase brain levels of a chemical called serotonin, which induces sleep. Good for bedtime, not meeting time.

Foods that contain protein keep blood sugar levels on an even keel, preventing extreme highs and then crashing lows that lead to loss of energy.

Certainly caffeine in colas and coffee still plays an important role in keeping minds alert. But it turns out that tea, with its combination of caffeine and an amino acid called theanine, increases alpha-brain wave activity that induces a calmer, yet more alert, state of mind.

Folate, a B vitamin found in orange juice, green vegetables and whole grains, has been shown to improve alertness in adults.

Drink up to stay awake. Dehydration can make you feel listless and lethargic and contribute to concentration problems. The water in fresh fruit and veggie snacks helps hydrate.