Astavakrasana Prerequisites
Astavakrasana appears to seem quite advanced, but it is much more accessible than you might think, as long as you have invested time in repeating/polishing up your basics/fundamentals.
Click on the following YouTube link to watch Jason Schramm of The Yoga Shala Rawai Phuket demonstrating some fundamental Yoga Postures that are prerequisites for the more advanced, Astavakrasana. Click here to watch.