I have had a hard time pushing my pages over Quality Score 7 - which is not bad by itself. Appreciated are the links to pages with Quality Score 8 - 10 + your targeted keywords. Remember to specify the Quality Score please! If you have some valuable advice to give on this issue - you are much welcome!
I had some interesting experience with Adwords page score. When I add website it was rated 7, but after few days gets 10. The point is you'll never get 10 before Adwords don't get some traffic stats. Website have opportunity to get 10 point if your CTR is much more than 5-7%. The only way to achieve this (if you have already 7 points) is make Adwords title ads most attractive as possible and closely related to the topic of the page. This is what Google calls - positive user experience.