Greatly increase the size of the House of Representatives, such that every seat represents approximately the same number of people. Greatly decrease the size (and funding) for Congressional staffing – with a much larger Congress, representatives themselves could perform lots of the functions (research, communication, etc.) that their staffs do now, which would keep funding levels roughly the same. I did some basic math in an earlier thread below:
Adding on to this, refurbish some DC gov buildings into a Congressional dormitory for when congress is in session. Nothing fancy, just basic small apartment housing.
Just as an idea, anyway.