Give yourself the appropriate amount of time to train, you cannot rush the process. It is crucial to slowly build up mileage to prevent overuse injuries. Be sure to have your shoes fit to your foot, arch, and running style and be sure you have broken in the shoe prior to longer runs. Warms ups are key and will help you recover faster and prevent injury. Overtraining leads to injuries so be sure to honor your days off and let your body heal. Dress appropriately and try to avoid running in the dark. Hydrate and fuel your body appropriately. I recommend 6-8oz of water every 20 minutes. You should consider carbohydrate and salt replacement depending on mileage. Don’t make the race day the first day you try the nutrition or the clothes you wear- you will regret it.