Drinking all day is an endurance event. You are literally slowly poisoning yourself all day and seeing how long you can take it. It’s a marathon, not a sprint. Listening to your body is the number one most important thing. If it tells you, “I’ve had enough,” well, you had a good run, but you need to stop, because you could do some serious damage. However, your body may send the message, “Just gimme another 15 minutes. I’m still working on that last one,” in which case, game on. Respect those messages, though, and do your best to listen for them.