How do you take off from the foot you want on the triple jump?

I have a track meet on Friday, and on hte triple jump, i always end up taking off on my left foot, and i cant do as good, how do i get off on my right?|||run a bit faster...|||if i understand your question correctly then .........if your left foot is right on your mark where you want to take off from; but its not the foot you want to take off of then just switch your starting feet before you run. hope that helps