As enthusiastic practitioner, professional teacher and still an aspirant who is looking for knowledge and understanding, these are the most beloved places I used to read.
One of the trustworthiest resource of yoga, specialized to ashtanga yoga, in my mother tongue, Hungarian:)
http://astangamandala.wordpress.com/
Monthly with more than 30 authors, about mind, soul, body and health. Inductive and supportive guides to asanas. Step-by-step videos, here:
http://www.mindbodygreen.com/”>http://www.mindbodygreen.com/
From beginners level to the advanced: yoga in all kind of amounts. Videos, online yoga lessons, courses with interactive teachers:
https://yoga.com/
