This video (http://www.mobilitywod.com/2013/03/ankle-positional-fault-fix-jill-miller-style/) shows how to roll out the outside of your ankle. Since I don't have their fancy-pants ball, I use a lacrosse ball and just don't push as hard. For the inside of the ankles, sit with one leg crossed in front of you, either in a chair or on the floor (I think it's easier on the floor, but if you're not flexible enough, a chair works). Then simply press/roll the ball all over the inside of that leg. You might be surprised at how far up the tension goes. I have lines of white hot pain that go from just behind my ankle to nearly halfway to my knee. Be careful to avoid the bone, obviously. You're pretty body-aware, I think, so I hope you won't have problems figuring out what's bone and what's hardened fascia.

Happy rolling!