Since my upper back spasms yesterday, and it not being good today either

, I've been looking for some advice about exercise/movement/stretches I can do to help the tightness in my muscles...
http://www.drbookspan.com/NeckPainArticle.html
This one caught my eye. I'd welcome any views on it, especially if you have experience of trying to sort out upper back pain for yourself.
A lot of this rings true, especially after I've spent so long recently resting while sick, often with my back rounded I suspect.
Please read and comment if you can

The help of you folk is always much appreciated...
Bram.