How to Create a Strong Password?

We must follow the following criteria while creating a Strong Password:
* The password must be a minimum of 8+ characters. * The password must have 1 number , 1 special character, 1 Upper Case character.
A very simple example is : P@ssw0rd. It fullfills all the criteria's. The 'a' is replaced by a special character @. The 'P' is of upper case. The 'o' is replaced by the numeral 0.
Well, you can now convert your regular password into a Strong Password by following a few changes like the example I have mentioned above for the simple password - P@ssw0rd.
* Make the first character Upper Case.
* Change all 'a' in the password to the special character @.
* Change all 's' in the password to the special character $.* Change all 'l' in 
the password to the special character !.
* Change all 'o' in the password to the numerical 0.
* Change all 'i' in the password to the numerical 1.