1.Always bet with low amounts.
2. Stop when you lost a certain amount.
3. Always have a number set in your mind you can lose.
Yes That is right when you bet on low you lessen your expenses and stop wasting much money, well if you lose certain amounts just stop and think of what happen make a decision if you want to keep on betting or not! and I think a number you can lose is only a consequence it is a random that you will lose in all the numbers out of gambling it is all on luck!
The safest method in gambling would be going with high amount at the start of the game . Gamling certainly makes you lose so either if you try to win big or lose it at the early of the game. It will be a very time consuming if you try to win with small amount as you might bust sooner or later