Use a hardware wallet like Trezor https://trezor.io/ (or similar devices)

It would best to use hardware or desktop wallet if it's possible.
But with web wallets you should be very careful. Be sure that your device isn't infected with malware and virus. Always check URL of website to avoid phishing websites. In general, web wallets aren't safest place to keep and access coins, this is why it's not recommend to use.

Hey there's no guaranteed way to stop a phishing attack, however you can take precautions like keeping your computer clean, having a strong anti virus in place, and most important avoiding suspicious sites, and emails that are spam/scam.

However best way would be to create a electrum wallet, do not use your wallet on a public wifi, never share your seed, private key and pin with anyone else.

However if you're yet not comfortable then make a paper wallet, I personally don't like it, so use it as a last resort.

Buy a hardware wallet like the Ledger Nano S[1] or a Trezor[2] if you could afford it. This is pretty much one of the safest ways.

of if you couldn't afford it: Make sure you're always using the correct URL(myetherwallet.com/mycrypto.com). Type the URL yourself manually; not through Google search. or better, download the MyEtherWallet source code and compile it yourself.

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[1] https://www.ledger.com/
[2] https://trezor.io/