Try to get eight hours' sleep each night starting March 6. Most of us just do not get enough sleep. Friday night stomach butterflies may inhibit a good night's sleep before the race. Food is a major concern for runners. I recommend going vegetarian for the final four days.
Meat takes longer to digest.
A steak eaten on Friday night might just sit like a rock in the gut the next morning. Extra servings of salads make for a better chance of a good bathroom experience in the final hours before the race. Whole-grain breads and yogurt are ways to insure tasty nutritious meals and snacks for those final four days before the race. Such eating overloads the body the night before an event, which means the pre-race bathroom session may not be as smooth as one would like. Try to be asleep or at rest by watching a movie on TV or reading in bed by 10 p.m. Friday night.