Gamblers don't realize they are addicted to gambling until it's worse which they've done unthinkable already like breaking the piggybank of his kid just so he could gamble again. But you as a gambler can also notice it to yourself before you get to the worse situation like selling valuables like jewelry so you could play again.
Is seeking a new strategy or thinking of betting while you are sleeping signs of addiction? If not, what are little signs that unfold you are becoming a gambling addict?
If it has already got to the point where you steal from your own child or sell jewellery from yourself or someone else just to be able to pay your next bet, then in my opinion it is already much too late to counteract, because then great damage has already been done. My first strategy to avoid happening stuff like that is to set yourself a limit of how much money you can and want to spend on gambling every week or every month without having any impact on your daily life and once that limit is reached you need to be disciplined and don't risk more money. That is the critical point, if you say "Ok only 50$ more but then that's it" that's the first step into an addiction in my opinion.