When your circadian rhythm is out of alignment with your life’s schedule, it can make it hard to fall asleep even when you are tired. It also becomes hard to stay awake in the middle of your workday. A common example of this is jet lag, which thankfully is usually short lived. However, many people experience circadian rhythm malalignment every day. This can include people who work odd hours or are “night owls” or “morning larks.” A careful review of your sleep history and a sleep diary can help identify these factors. Often, strategic timed use of bright light exposure followed by properly timed avoidance of light sources can help adjust your brain’s inner clock. Sometimes medications are needed as well. Sleep testing is not usually needed.