From what I understand is sometime after 9/11 Congress needed to get a bunch of stuff done, so they essentially agreed to new Senate rules that allowed Senators to essentially anonymously file paper work to have a filibuster. At the time it was done as a time saver however we can all see that its being misused and its time to reform it. Simply change the Senate rule (this does not involve the constitution) to go back to "stand your ass up and talk" to filibuster. That way we would all know EXACTLY whom is opposing a bill and WHY they oppose it. I feel that would prevent the useless filibusters to prevent the opposing side from passing good legislation and anyone whose main interest is to gum up the works would be exposed. If its an item none of us want passed then that Senator is the hero.
Once again this is my brief overview of it so I could be slightly off although I'm sure someone will let me know.
Then you remember WRONG, the rule change happen in 1975. If you look at the number of Fillibusters each year, you will see the number increase dramatically after 1975.