The safetiest that i know is to use the faucet bonus don't spend your bitcoin from your wallet just use the faucet bonus and make some profit if you are not lucky to get large amount.. its better to stop so that you can control your self for being greed..
your advice is good but stop gambling is always better, better than any gambling method. it's always worth mentioning. but more important is self control.
Stopping with gambling can be good but he is searching for a way to do it safe, but there is no safe method so after just doing some low bets and always stop when you lost already once, is stopping with it overall one of the best
Although I would consider self control faster and earlier so you can still do it a kind of safe.