SLEEP. We all know we should sleep more. Almost every adult I know complains that they are "tired" or "sleepy". This week, it's time to do something about it! Your challenge this week is to accumulate at least 7 hours of sleep every day this week. Missed sleep during the night may be made up for with naps during the day. Under the conference room table counts. Naps at red lights does not.

The Harvard Women’s Health Watch suggests six reasons to get enough sleep:

1. Learning and memory: Sleep helps the brain commit new information to memory through a process called memory consolidation. In studies, people who’d slept after learning a task did better on tests later.
2. Metabolism and weight: Chronic sleep deprivation may cause weight gain by affecting the way our bodies process and store carbohydrates, and by altering levels of hormones that affect our appetite.
3. Safety: Sleep debt contributes to a greater tendency to fall asleep during the daytime. These lapses may cause falls and mistakes such as medical errors, air traffic mishaps, and road accidents.
4. Mood: Sleep loss may result in irritability, impatience, inability to concentrate, and moodiness. Too little sleep can also leave you too tired to do the things you like to do.
5. Cardiovascular health: Serious sleep disorders have been linked to hypertension, increased stress hormone levels, and irregular heartbeat.
6. Disease: Sleep deprivation alters immune function, including the activity of the body’s killer cells. Keeping up with sleep may also help fight cancer.