Hi! One of the main mistakes in poker is playing tired. Poker requires concentration, a clear mind, and all this is blunted with every hour of play. We need breaks. There are players who sleep during the day and like to play at night. And they're good at it. But often at night the body feels the need to rest, so I think it is not so effective in performing mental activities. Especially if you've been playing all day before. For example, I generally do not think clearly at night or when I play for many hours in a row, I have all the thoughts that I want to sleep and I feel bad. As a result, I rush to make a decision in the game and make mistake after mistake.