If you've already won, walk out, and get back in the other day, with the same amount you bought in before.
If you desired to win more, you have a high chance on of losing, and possibly everything
Gambling is gambling, it is easy to say these things when we are just advising it to someone who is very addicted to gambling but when we are on that shoes, it is hard to control ourselves. I know that since I am in that shoes in the past and I am so blessed that I got out of that habit. I said this and I will repeat it, the best practice is not to gamble or the practice of avoiding yourself from gambling.