Essence of safeguarding your wallet is to prevent leaking of mnemonic words or potential risks of stolen by acquaintance or hackers. Once the mnemonic words get lost or hack by third-party, it might result in assets loss. Here are some tips for you.
Write it down on the paper and make an extra backup, make sure the mnemonic words are clearly written in the correct order.
Additionally, please do not use screenshot, photos or any electronic files to store your mnemonic words.