I have been reading Yoga Cures by Tara Stiles and would recommend a few of the poses helpful for stretching.

You are able to preview the book below:

http://books.google.com/books?id=zz9...0knees&f=false

Calm eyes, (relaxes pain with migrane) seated arms crossed hold knees (my neck injury is very sensitive to this) and the other seated, relaxed poses shown I am able to do.You are not able to preview all of the seated relaxed poses.

Basically this book has common ailments and explains certain poses for each. In the back of the book all the poses are illustrated, of which we can see some.The migrane section includes down dog, child's pose, and temple massage, which are more toward preventing stress.

I do enjoy Tara Stiles', non-new agey/ straightforward yoga approach but I also recommend another book, http://yogaforpainrelief.com/
if you are a beginner because it is more gentle for PCS. I have mentioned it before here.
Best wishes.