What to do if lack of sleep is affecting your work success:
Hames says if you're not sleeping well, you should think about making your day "pro-sleep" when you're awake. What does this mean? "Try to get as much natural light as possible: It will not only help you feel more awake during the day, but it will signal to your body when it's time to wind down at night."
And if you're having problems falling or staying asleep during the night, avoid napping during the day, he adds.
Another trick is to prepare well for bed.
"Start relaxing and preparing for sleep at least 60 to 90 minutes before bed," he suggests. "Stop any work or intense activity, don't have any intense conversations, and spend some time doing other things before getting into the immediate pre-bed activities like brushing your teeth, putting your pajamas on, or setting your alarm clock. Go to bed only when you feel sleepy, not just tired out."
Finally, he says, keep in mind the number of hours of sleep you need varies from person to person. "There's not a right or wrong amount."
Don't assume you need the often-recommended 7-8 hours. "Although this is the average, everyone's different," Hames says. "In fact a shorter, more compacted sleep may mean a better quality sleep."