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.
Only if it was that easy to achieve. A lot of people say this, but in reality, it is easier said than done. Human mind is centered on greed and no one would want to be gambling losing money as what they are after most of the time is getting lucky and winning big.
The best practice is just to realize that you cannot get much from gambling unless you are lucky and be able to use that mindset to gamble only what you can afford to lose and you will be fine enough with it even if you ended up not getting lucky.