Nanner Split said:
Just completely disconnect yourself from anything new and Star Wars-related. It worked for me. The last new Star Wars thing I absorbed was Revenge of the Sith in theatres, which was nearly four years ago. Other than TMBTM's Star Wars Silent Film Edition edit, I haven't watched any of the prequels since then, just the OT. It's worked brilliantly for me, especially since I've only seen RotS once (seen the other two a handful of times each). I barely remember anything about them.

This. Though, I don't know how you can wipe the memory from your mind. It's like the Holiday Special. Once you've seen it, the crappiness is burned into your brain forever.