How do you extract information from someone, especially a trained or highly motivated terrorist, without torture?

For all of you who think this is such a terrible thing how would you suggest we get the info? Just lock them up and hope they decide to share?

Yes being water boarded would be horrible, its like being drowned, over and over again, cant breath, cant get away. But it does no permanent damage and stopping provides immediate relief. Should we go back to a shower, battery cables and a sponge?