I love using the wall to help me with my yoga practice. It's great support, and it really helps when I am trying to stretch.
I found this really awesome yoga video on backbends, and it gave me confidence to get back into my practice: Yoga Body Workout: Yoga Body Workout: Backbend Class with Lesley Fightmaster.
Challenge yourself everyday, and DO NOT GIVE UP.
Practice. Practice. Practice.