1. After waking up, because it helps activate the internal organs.
2. After a workout, because it helps bring the heartrate back to normal.
3. Half an hour before a meal, because it aids in digestion.
4. Before taking a bath, since it helps to lower blood pressure.
5. When you are feeling sick, since the body simply functions (and heals) better when hydrated.
6. When you are feeling tired, because that recharges the system.
7. Before going to bed, to replenish any fluid loss.
8. When surrounded by infected and sick people–to avoid letting infection settle in the body.