Gambling has risks but it does not mean that you dont gamble at all. Gambling can be fun for some people or it can be a time pass for rich people. The best thing about the gambling is that it can make a poor person Rich and a Rich person Poor in a matter of seconds.
For the Safe methods of gambling, there are none i think. The only method which i have learnt over time is gamble with the mind and not with a heart and you will succeed for sure.