Jemagee,
Well, I only get one vote, and only for my particular Representative, but I do get to voice my opinion to anyone who will listen, and encourage them to use their vote the same way.
And I believe that holding the "suicide vote" over a politician's head based on one vote on one issue isn't irresponsible, but is rather, in fact, the ONLY way we will ever make sure that our Representatives and Senators are returned to the general population often enough to prevent them from losing touch with us. Forget "term limits," because no one believes they will work, anyway. Declare things that are important to you as "suicide votes." Stick to that, and you'll assure that your politician will be returned to you often enough to prevent folks like your Lois Capps or our Jo Ann Emerson (who is another Congressional-widow-turned-Congresswoman).
If you want real change in Congress, refuse to vote for incumbents who vote in ways you oppose, and encourage others to do the same.