Password Guessing

This seems silly but this can easily help you to get someones password within seconds. If hacker knows you, he can use information he knows about you to guess your password Hacker can also use combination of Social Engineering and Guessing to acquire your password.
Countermeasure:

→Don't use your name, surname, phone number or birthdate as your password.

→Try to avoid creating password that relates to you.

→Create complex and long password with combination of letters, numbers and panctuations