In one sentence, describe what the following article is about:

We tend to feel more tired when we are dehydrated because our blood thickens, forcing your heart to pump harder to circulate the blood throughout your body, and this extra work by the heart tires us out.  Doctors recommend having 2 liters of water a day, or about 8 glasses. Soft drinks and coffee don’t count. You can also get water naturally through fruits and vegetables such as watermelon, celery, and broccoli. You’ll know you’re getting dehydrated if your urine turns from a pale, clear fluid (as it is when you’re well hydrated) to a darker yellow. Don't wait until you feel thirsty to drink. By the time your brain starts sending you signals, you’re already lacking fluids, hence the message of being thirsty. Drink regularly throughout the day to stay hydrated. Getting little bursts of carbohydrates and protein throughout the day will help you stay awake and alert. Plus, if you eat every 3-4 hours, you won’t have blood sugar crashes, which make you feel tired.  Eating breakfast really is the most important way to start the day, so don’t skip it. If you find you’re often on the run to work or school and don’t have time for breakfast, get into the habit of preparing grab-and-go options. Include fibre so you have the slower release of carbs that keeps you from crashing. Include popcorn, tortillas, or whole grain pitas in your meal and snack time, for example. Small meal examples that work include low-fat yogurt with berries and granola, a whole grain chicken wrap with greens, or apple slices with some peanut butter. It is generally recommended that you avoid caffeine after noon. When you live with chronic insomnia, this might be really hard to do so try to minimize it to 200-300 milligrams, or no more than 2 cups of coffee.  Decaffeinated coffees are not 100% caffeine free, so don’t be fooled. Energy drinks may not be a good choice. They have up to 250 milligrams of caffeine per serving and can increase your tolerance to caffeine, meaning you need more and more caffeine to feel the effects. They also have a lot of sugar and don’t actually provide any more energy than a regular soda. Although alcohol is often associated with partying and fun, it is actually a depressant that will drag you down and make you even more sleepy, make you restless at night, and increase your night-time waking.

Summary:
Stay hydrated. Eat small meals regularly throughout the day. Enjoy caffeine responsibly. Avoid alcohol.