Drink plenty of water.

Make sure to drink enough water. A good rule of thumb is to drink half a liter of water for every 15 kg of body weight. So, if you weigh 75 kg, about 2.5 liters of water is appropriate. However, remember to reduce your water intake well before going to bed. Also, remember to urinate just before you go to sleep, so you don't wake up needing to go to the bathroom.

Why it helps:
A good fluid balance is important for your health. If you don't consume enough water, you could become dehydrated, which negatively affects sleep and makes you feel tired and exhausted.