If you haven't seen this, take a look! Incredibly well done and I enjoyed the four suggestions.

That said, based on my own experience, I think any future Star Wars will only be decent if J.J. Abrams remains insulated from this sort of thing. It's much more important for him to remain true to his own creative vision of the universe, otherwise he'll end up second guessing creative decisions based on what we, the fans, say we want. To a certain extent, I think that's the trap that George fell into. George created the first two films based on his own creative instincts. But then other pressures and expectations began to creep in. Those kinds of pressures always crush intuition.

Now that I've encouraged J.J. Abrams to not read anything I say (which I don't think I have to worry about anyway), I've got a couple more rules... or "guidelines" of my own.

No Recognizable Movie Stars - I watched Star Wars as a nine year old and I didn't want it to be a movie. I wanted to pretend it was real... maybe because it felt so true and consistent. It helped emmensly that I had never seen any of the actors in any other films. Luke Skywalker had not starred in Jaws. Carrie Fischer had not starred on Love Boat. In my mind, the people that inhabited the Star Wars universe existed a long time ago in a galaxy far far away. So no stars in Star Wars!
Star Wars certainly had elements of a Western, but I've always been struck by its medieval themes, which is far more magical and wonderful to me. A black knight and a dark sorcercer. A princess and a peasant who rescues her from a dark lord. A teacher of mystic arts. A great castle (the death star) and the gift of a sword from father to son. All of this was beginning to wane by film three (and was gone by the next three films). All of this stuff is the real magic of Star Wars... it's the "Long Time Ago" of Star Wars.

Moving on, for your amusement... here's my ridiculous plot idea for the next films! Luke Skywalker gets all forced up and mega powerful, turns to the dark side like his father, eventually redeems himself and finds a way to shoot himself back in time (not a wormhole--something a little more force-ish). The process changes him into a shrivelled up mockery of his old self... Yoda! That's right, Luck becomes Yoda! Now he can eventually fail to teach his youthful self to use the force! I just blew your mind, didn't I? :-)