If you really want term limits, be sure to vote. And when you vote, be sure to vote against the incumbent. At least, vote against the incumbent if he or she has served what you consider a maximum number of terms.
Of course, if your favorite candidate serves more than this maximum, remember that according to some the people have decided. This means the people have decided against term limits.
I think that term limits is a canard of those who think their party is not getting enough seats. What will they do when the other party keeps getting more seats more often even with term limits?