1. Take care of your money, manage it properly and carefully.
What I mean here is that you need to be wise and careful in storing, organizing and managing it. If you trade on an exchange, then when you finish trading, put your money back into your personal wallet (take your crypto out of the exchange and move it to your hardware wallet or mobile wallet)
Do this after finishing trading. Because actually the most dangerous thing is storing money/crypto on an exchange.
Just as you have pointed out the best advice is do not save on exchanges, right there is No secondary advice attached to this except that they have their risks. The first is since it will be harsh or probably just too much of a problem on traders to be withdrawing their funds everyday back to their individual wallets. Personally I think this might even lead to send to a wrong address either by mistakenly typing the wrong one or during copy and paste which would be easier one could fall into the mistake of getting affected with clipboard malware.
So my advice which still Carries its risk will be if you are still trading just everyday then you might have to leave your coins but make sure it is an amount you can lose. But make sure you’re not trading on just a single exchange try to diversify this amount into different exchanges and as such should one faces any hack or shutdown you can get back to the other and withdrawal your funds because it will certainly be hard to have top exchanges shut down same day. But make sure you are taking off your funds on exchanges every time you’re taking a trading break.
2. If you are forced to store your funds or crypto on an exchange, don't forget to take a screenshot of your balance and account. This SS is useful if at any time something bad happens so you already have proof that you have funds there. Usually SS balance is a requirement for claiming recovery money.
If you have some other advice, try sharing it here. And if this post is useful for you, give me merit
I don’t think this will count because no exchange will actually accept screenshots when returning people’s money. Graphics Designers have evolved as technology also evolves there will be multiple of scammers that could design a screenshot perfectly and put in ridiculous amounts there so it will be just a waste of time for them to accept screenshots as proof.