Severely restrict the filibuster

Neither house of congress shall adopt or operate under rules that prevent any introduced bill from coming before that house for a vote after a reasonable amount of time for deliberation. A minority of three-tenths of the members of each house may delay the final consideration of any bill for a period of seven days. A minority of four-tenths of the members of each house may delay the final consideration of any bill for an additional period of seven days. A minority of half of the members less one of each house may delay the final consideration of any bill for a third additional period of seven days. Further delays of the final consideration of any bill shall only be possible with the concurrence of two-thirds of the members of that house.

(This would all but kill the filibuster. A minority of members would be able to force a short delay, presumably to allow a little more time for deliberation. However, this amendment would eliminate the possibility of a bill being filibustered indefinitely.)