The sitename was just an example! The point is to choose a password easier to remember and get in some way (using for example an encoding/hash function) a more longer random string
Just use a password manager (i.e., https://github.com/zdia/gorilla/wiki) where you can generate random, uncorrelated, unique passwords for each site. Then, using the manager, you don't have to remember the individual unique passwords, it performs that function (remembering) for you. All you need to remember then is your master password to unlock the manager.
Once you've begun using a password manager, you'll quickly wonder why you didn't start using it sooner.