After accepting the loss the person should not chase his loss too because that will cause more harm to him. Many people would accept the loss but still want to win back the amount and from there continues losing has started.
This is the most wrong or baddest advise ever. You want the loser tell someone about this loss. I don't know if you are real gambler. A big loss should be a top secret only to yourself and which tell a third party, it is no more a secret. And once others hear about it, your mockery point has been revealed to the World. They will use you to analyze gambling and label gambling as a bad activity. This is where the bad name for gambling comes in.

This pat is good. When the person is on depression because of the great loss then it is good he went out with friends to have funs. Do things to laugh and run around and if he is good in local football, he should play ball with friends
This number four and the number two are just the same. And if the person wants to leave gambling then that is the time this two advises are needed. And if it is because of the loss then they are not needed.

And as the number five every human is a living testimony and according to the saying, if we are living, there hope. So one day he will get back that amount that he loss either in gambling or in another way.