You know you should eat breakfast. At least, you know that until you decide to sleep in and have to be somewhere in 30 minutes, giving you just enough time for a shower and a coffee. However, to optimize energy and alertness, it’s important to start the day out right by eating a breakfast with protein and good carbs to fuel the brain and muscles. Luckily, a happy medium between a donut and full-on hot breakfast exists. Here are 10 satisfying, healthy breakfasts you can grab and eat from wherever you are, like your car, the train, the airport or the gym.