If you feel upper body posture is part of the problem, here are some simple things I use -
http://neurotalk.psychcentral.com/album.php?albumid=422
This site has a lot of info on how sticky fascia can affect us and cause pain -
http://www.selfcare4rsi.com/fascia.html
You might also have trigger points - something you can treat with a tennis ball or similar size ball on the floor or against the wall -
http://neurotalk.psychcentral.com/thread125577.html