I've started doing Star Wars Marathons in what they call "Flashback Order".
First you watch A New Hope and Empire. Then you watch the prequels and go to Return of the Jedi afterwards. It's a good way to introduce newcomers as this way, you start off on the right foot, the surprises are preserved, and you build anticipation for the resolution of the story in Jedi among other reasons.
I've also sometimes inserted the Genndy Tartakovsky Clone Wars series in-between Clones and Sith as it essentially functions as another movie by being two hours in all and leads directly into Sith. I like the CG show as well, but as a full TV show, it's kinda awkward to put into a marathon what with the show jumping around in time in the first couple seasons and just being a lot of material to go through. Kinda hoping when it's done, someone starts making movie edits out of various story arcs.
