To stay away from the gambling is the best trick to avoid losses. You can not depend on your luck all the time to gain the profit, sometimes you will win but most of the time you will loose your money, so if you can not afford to loose the money then just stay away from gambling.
To stay away from gambling, you will not lose a penny. But you will also not winning anything. Gambling is not just about winning. To some people, it is fun to gamble. They enjoy gambling even though they know they will lose.