How to increase quality score, to display my ad in top three positions. Any suggestions from Adwords Qualified Professional

Adwords Quality score has a complicated way of producing the score, most of which google does not tell you about. However if you do the basics right, it is easy enough to improve your score. The biggest factor you are probably facing is relevancy. You need to make sure your advert text and URL's and the web page you are linking to are relevant to the keyword (i.e. if you are using the key phrase 'blue ray dvd' then make sure this is used in your advert, and is related to the url you are linking too and also the keywords are used within the title tags of your web page and also within the actual text). If you do this then your score will increase. There are 100's of other factors but try that for starters.