Most people need between 7 and 9 hours of sleep each night to be productive. However, there is no definitive answer as to how many hours of sleep is the "ideal" amount. Most experts believe that more than 8 hours of sleep can hurt your work performance. Furthermore, a lack of sleep can result in feeling tired, cranky, irritable, and foggy-headed - all signs that you're not getting the rest you need.  Studies have shown that chronic sleep deprivation can lead to cognitive problems like poor decision-making. So, get enough sleep each night to be at your best physically and mentally!