I won’t come back on password policies. Everything has already been covered multiple times on this topic! Regular password changes might be forced in your organization. When you use the same password multiple times a day, you finally don’t think about it and type it “blindly”.
The idea is very simple: You enter your new password and fill it again and again in the remaining password fields. Click on “Check Passwords” and the result will be displayed: how many typo-error you made. Note that you don’t need to fill in all the fields.
The script is here: PWtrainer