What are your AdWords Ratios?
workwells: You should be able get to 3.00% plus CTR on Search network without a lot of work. If you have limited budget, turn off Content ads. It will gooble your budget, giving you little in return.Concentrate on writing better ads. Keywords your bidding on should be in the ad. Create adgroups for like search terms. Have at least two or three different ads for each adgroup.The landing page is just, if not more, important than the ad copy. Keywords should be in the Title, and meta description tags (Google ignore meta keywords), in a H1 headin, in the first sentence of the first paragraph, and another time or two on the page. If you want a good CTR, the landing page is your friend.