For the full series see http://tale2tell.com/after-effects-basics-tutorials-to-get-you-started-with-adobe-after-effects/

Twist is getting more powerful. Since this tutorial you can now change the centre of a twist making it even more interesting to use in creative ways. Wiggle Paths is an auto-animating tool which wiggles the paths of you shape layers. While these may have limited application it is still worth knowing about these tools.