I personally don't really have an addictive personality, but I can think of some things that might help prevent you from getting addicted though.
Always take enough long breaks from gambling if you feel that you are playing more than you should, I'm talking about a few weeks or months.

Make a budget before you start playing and hold yourself accountable. If you spend more than you intended, it's time to quit for a few days at least.
If you really can't control yourself, it's time to admit that you need professional help.

You can find many things to distract you from gambling, I think the best thing to do is something active like sports or something done in the outdoors.
If you're physically tired, gambling is not something you think about, at least not for me.