good hip stretches, posture advice

[firenze11]

I've always enjoyed Pigeon pose in yoga. I think it does the same thing as the piriformis muscle stretch Wahine linked to, but I'm not sure. My yoga instructor always had the class lean forward and put our foreheads on the ground to make it more intense/deeper (if we felt comfortable doing it).

Edit: FWIW I was told by a personal trainer at school that my posture could use a bit of work. He told me that I needed to keep my abs engaged throughout the whole day. Basically to pull them in a bit and pull myself up a bit. Being conscious of pulling your abs in may help with not tilting your pelvis while standing. That's just an anecdote, though. I hope you find something that works for you.