Your car isn't going to make it far without fuel and you're not going to perform at a high level without quality nutrients in your body. It's not just food--it's also water.
In fact, being dehydrated by as little as 1 percent can lead to a decrease in mood and cognitive abilities according to a February 2012 study published in The Journal of Nutrition.
Before reaching for your morning espresso, properly rehydrate by drinking 20 to 32 ounces of water. To save time, try a morning smoothie that can both hydrate you and give you an a.m. serving of fruits and vegetables.