Just watching a bit of the Star Wars movies on DVD right now. I have three quick suggestions to make the original movies better.
1. At the end of The Empire Strikes Back, when Luke is holding on for dear life he should have a rapid-fire series of flashbacks showing his life. One of them should be him making out with Chewbacca in a filthy space latrine stall.
2. Return of the Jedi should just be the scrolling intro words for two hours. Just do the entire plot in written form.
3. Travel back in time and make sure that George Lucas has a stroke before redoing the Jabba the Hutt scene to add a fun musical number.