Recent studies have shown that both workers and athletes speed up their performance when around the scent of peppermint. So if you're feeling drained, pop a peppermint or some peppermint gum to help get you energized. Or you could assault your nose with some strong scents, peppermint included. If you have some essential oils handy, one big whiff could be all you need to set your senses on high alert. Caffeine, which is found in coffee, tea, sodas and energy drinks, are great for a short boost of energy. Doctors recommend that healthy adults limit their caffeine intake to 400 milligrams per day, which is about four cups of coffee, 10 cans of soda, or two "energy shot" drinks.  While 400 milligrams is safe for adults to consume on a daily basis, excessive caffeine intake can lead to high blood pressure, insomnia, irritability, upset stomach and muscle tremors. So try to limit the amount of caffeine you drink each day to an absolute minimum.  Caffeine will definitely give you a quick shot of energy in the short-term, but does little to help you ward off fatigue throughout the course of the day. Be sure to eat healthy and drink plenty of water to avoid an energy crash later in the day. Limiting your intake of caffeine to the morning hours can help you avoid insomnia in the evening or nighttime. Also, it is wise to hold-off on that first cup of coffee or soda until after nine a.m. Your body naturally produces cortisol at higher levels between eight and nine a.m. and caffeine can actually diminish that natural rush you would otherwise feel. Not only are chia seeds trendy, but they're rumored to have some serious energy-boosting benefits as well. Chia is full of B vitamins, fiber, and protein, so it can help give you an extra boost of energy. Chia seeds mix well with yogurt or can be mixed into your favorite flavor of smoothie. You can also put them in breads or muffins. So you want a brick of grain and protein to keep you going? Energy drinks and power bars are all well and good, but if you make them yourself...

TL;DR in Vietnamese:
Ăn một vài thứ có vị bạc hà. Dùng thức uống chứa caffeine. Cho một ít hạt “chia” vào khẩu phần ăn. Tự làm thức ăn và nước uống tăng năng lượng. Uống nhiều nước. Ăn bữa phụ. Bổ sung chất dinh dưỡng.