Hi, I have a few blogs with moderate traffic but I'm struggling to make much ad revenue from adsense. What do you think are the best places to position ads on the site for higher CTR?
In a place indistinguishable from content so they mistakenly click on it. See example here. http://www.dumpsquestions.com/ This will be one of the greyhat technique of generating clicks from adsense.
Welcome to the club. It takes time and money to get some results from google adsense. First of all you have to have a good quality of targeted traffic.
Look at my blog http://indiacallsfree.blogspot.com I changed my ad placement recently and I am happy with results. Besides the main page click on a post title and go inside that. You will see additional changes which bring a major part of revenue.