Perhaps this video will convince you that there can be results when the grass roots in politics makes a concerted effort.
Keep on signing those petitions, sending emails, making phone calls, commenting on Facebook and Google+, writing blog posts, or whatever you can think of that might give courage to politicians to do the right thing.
As the above video shows, they want and need you to do it, and it works.
Here is even a link to say Thank You, Sen. Reid, for Filibuster Reform.