One of the things that will keep you awake is anxiety about being awake. You might be thinking, "How can I run my best if I haven't slept a wink?" But remember, one night's sleep will not make or break a race. In fact, many experienced runners will tell you that the most important time to get a good night's sleep is the night before the night before a race. In the days and weeks leading up to your event, really try to prioritize shut-eye. That way, if you're unable to sleep on race eve, you'll have plenty of Zzz's in reserve.