What should you keep in mind while choosing an effective password?

We should keep the following things in mind while choosing an effective password:

1. Use different passwords on different systems and accounts.
2. Don't use passwords that are based on personal information that can be easily accessed or guessed.
3. Use a combination of capital and lowercase letters, numbers, and special characters.
4. Don't use words that can be found in any dictionary of any language.
5. Develop mnemonics such as passphrases for remembering complex passwords.