"A good night's sleep is like pushing the reset button in your brain, " says Edward Hallowell, M.

CNN: Fuzzy brain? Improve your attention span

Another worthwhile read is "The Childhood Roots of Adult Happiness" by Edward Hallowell, a child and adult psychiatrist.

WSJ: Tools for Building Self-Esteem in Kids

"Some people don't believe in it and they never diagnose it, some people see it everywhere, " Hallowell says.

CNN: Youngest kids in class more likely to be diagnosed with ADHD

"Caffeine raises your adrenaline, giving you a quick burst of focus, " says Hallowell.

CNN: Fuzzy brain? Improve your attention span

Parents who provide ample chances for their kids to master new skills and capabilities allow self-esteem to blossom naturally through experience, Dr. Hallowell writes.

WSJ: Tools for Building Self-Esteem in Kids

If you're running on fumes and about to head into a marathon meeting, drink a glass of water and eat a snack with a balance of carbohydrates, fat, and protein, like an apple and a piece of cheese, recommends Hallowell.

CNN: Fuzzy brain? Improve your attention span

"The study points out that slipshod diagnosis can be a problem, and if you're getting diagnosed with ADD just because you're immature compared to your peer group, then that's not good, " says Dr. Edward Hallowell, a psychiatrist with offices in New York City and Sudbury, Massachusetts, who specializes in treating children and adults with ADHD.

CNN: Youngest kids in class more likely to be diagnosed with ADHD