Use Strong Encryption Keys
Simply enabling encryption is a huge step toward making your Wi-Fi network safe. However, you can make it even more secure if you create and use a strong encryption passphrase/key. For WPA passphrases, this means using both upper and lower case letters, numbers, and punctuation (any ASCII character), up to 63 characters long. For example, f8!U&1:C>0x;5i*wU2^bQ9(dJ4f#9v is tremendously more secure than using mynetpass for the passphrase.