I've been going to a yoga class once a week for the last nine months or so. I guess I'm lucky that I have a very gentle instructor who repeats something like this many times in each class: "let go of any preconceived notions and judgments of what you should be doing and pay attention to yourself". I've stopped looking around the room to see what others are doing and just try to push myself a bit more each week. Its been slow but I think its paying off.