Gamble only with your free time and don't fall for your emotion, it will lead you to lose control as you win.
If you're going to gamble, do it for entertainment, not for profit.
Correct.
Gamble only for entertainment as if you are not expecting some wins but if you win then be thankful.
If you don't want to suffer, better to play this way, enjoying and entertaining yourself, considering that the amount that you will spare can be forgotten after, always think for positive side and if you win and you are already satisfied with fun that you've got also consider to quit and enjoy with some earnings that you've got that's an additional rewards.