Hook the wiper to one side of the pot and then put the pot in the circuit in the correct orientation. It really is that simple, what are you not getting?
edit: in the case of your logarithmic pot. Out hooks to in on the positive side of the circuit and ground hooks to ground. They are trying to tell you something, which side of the pot has the larger resistance since it is not linear. I might be wrong, but I think in the case of a volume control, the wiper wouldn't connect to either side of the track.