1. Keep bookmark trusted website
There are many fake website like a fake MyEtherWallet spread on social media, email and any grub chat.
And if you want to be safer, you can simply download MyEtherWallet's source code from their GitHub repository[1] and use that instead.
2. Use secure password while creating new wallet
Use capital letter and number to secure your password. If you want more secure add Symbol in your password
If we're talking about preventing your password(s) from being bruteforced, then having a password with more characters would benefit you a lot more than just adding symbols here and there on a short password. As much as possible, keep your passwords at 40 characters minimum. Yes, it might be too much to memorize, but here's where password managers comes in. Take a look at KeePass[2].
[1]
https://github.com/MyEtherWallet/MyEtherWallet[2]
https://keepass.info/