Identify games with the right variance
This simply means that you should look out for games having the right variance. A high variance game can make you rich or poor in a matter of seconds. Low variance games are those that give out money evenly over a period. These games can also deprive you of your funds gradually.
Therefore, if you have set aside $500 as your bankroll (comprising 100 bets of $5 each), do you think a low variance game suits you? Conversely, do you have the risk appetite to absorb a few initial dramatic losses in your game? Let's look at some examples.
Example 1
You have placed 200 bets, and so far you have lost only 2 units. The bankroll is now down to $490. Here, it seems the variance isn't high and your budget is more or less constant. You can consider maintaining your unit size for the rest of the game.
Example 2
You lose 20 units after placing 200 bets, and now your net bankroll amount is $400. The percentage loss is 20%. Can you afford this loss? Perhaps it is time to lower the unit size by 50%. It is your decision.
Example 3
Here, you gain 10%, and your new bankroll is $550. Now there are two options before you. Keep the profit, and start once again with your original bankroll. The other option is treat $550 as the new bankroll and make 10% of this amount ($5.50) as your betting unit.
Now that we've understood the art and science of bankroll management, let's move on gambling responsibly.