When should we drink water?

We all know that water is good for our health. It helps in cleansing the body of toxins, helps digestion, increases metabolism and so on. The most common question I've seen people asking about water drinking habits is: how much water should one drink in a day? And there are various standard answers available to this question. Some go by the "8 by 8" rule - drink eight 8-ounce glasses of water per day, while some customize it further depending upon the body weight. In a nutshell, we do have some concrete answer to this commonly asked question.

However, I haven't seen many people bothered about when one should drink water throughout the day. And perhaps due to this lack of interest in this question, I'm yet to see a concrete answer to this question either. I've seen people recommending drinking/not-drinking water at all the possible times throughout the day: before the meal, during the meal, after the meal, before the workout, during the workout, after the workout, so on and so forth. People have proposed various theories supporting their claims on when one should drink/not-drink water. Out of those, I'm convinced about the following two things so far: Drink water the first thing in the morning and Drink water some time before the meal.

For the remaining timings, I'm still searching for the right answers...