There are many causes of fatigue. Our daily habits and dedication to work mean that we spend most of our days exerting our bodies and minds. We normally either skip lunch or eat fast food while working and this contributes to experiencing symptoms of fatigue later in the day. Some symptoms of mental fatigue that we experience are lack of ability to stay focused, loss of attention and somnolence, i.e. a sleepy mood.Other causes of fatigue may include jet lag, sleeping disorders, depression, stress, too much exertion, etc. Some of these can be very dangerous, especially if we operate a vehicle at the end of the working day or cross busy streets without paying attention. We are also more likely to experience symptoms of fatigue during the winter season. This is due to a shortage of light and gloomy weather, which contributes to stress and depression. The best way to avoid suffering from fatigue is to replenish your body with energy. It is always advisable to choose natural methods rather than taking pills. Drink sufficient amounts of water every day. There is no strict rule as to how much liquids you should drink, but anything in the range of one to two liters per day should suffice. Eat healthy food that is rich in vitamins and nutrients. Try to eliminate sugary snacks from your diet and choose nuts, fruits and vegetables instead. If you can, you should try to relax in the middle of the day even if it is only for fifteen minutes. You can also consider meditation or taking oily and scented baths, which work wonders on removing stress. Fresh air can sometimes have marvelous effects on how we feel. Make it a point to take walks in the park in your spare time or do any other activity that implies being outdoors. Regular exercise is also great for avoiding fatigue permanently. In the beginning, you may feel tired, but over time you will boost your endurance and feel stronger. You can find an adequate exercise routine that will fit in with your lifestyle. You do not necessarily have to be a sports maniac. Try to walk to work instead of driving your car or taking public transportation. Walking is a great physical exercise and it will also allow you to avoid the bustle and confusion of traffic that contributes to stress.