Make a strong password: Choose it at random, or think of a word easy to remember with differents types. Example: H0u$3
Use differents types combinations: Mix letters (both capital letters and lower cases) numbers, symbols and special tupes, and punctuation marks.
Don’t share your password with anybody.
Don’t repeat your passwords.
Use a password manager: As Dashlane, which allowe us to manage our password safely.
Check your passwords regularly: You can use Password strenght checker, an online service to check the security of your passwords.
If you cannot think on an easy password, use those online passwords generators: PasswordLive,Strong Password Generator, Random Generato and Generate Password
Read more (only Spanish) here.