The method is simple and if you remember the series of ranking articles we had back on this site in July you'll be familiar, all you have to do is rank each of the Star Wars films 1 - 8, the ranking corresponding with a point - once everyone has voted (or once participation drops) I'll add my rankings and then add all the points up and the film with the lowest scoring will be the highest on CBM.com's acculumative rankings and so on and so forth.
As such do try to avoid having films tied at a position and please feel free to give reasons and what have you, and rank in whatever criteria is pertinent to YOU however you measure quality, objectively or subjectively - it's completely up to you.
Not that you need a reminder I'm sure but these are the films in contest:
Star Wars Episode I: The Phantom Menace
Star Wars Episode II: Attack of the Clones
Star Wars Episode III: Revenge of the Sith
Rogue One: Star Wars Story
Star Wars Episode IV: A New Hope
Star Wars Episode V: Empire Strikes Back
Star Wars Episode VI: Return of the Jedi
Star Wars Episode VII: The Force Awakens
Happy Ranking!