If you are using AdSense referrals in your blog for products like Firefox, Google Pack, Google Apps, etc - you may want to check this quick post on increase income from referrals. Basically, you set up multiple channels for every single product, lend them descriptive names and then do a split test. This technique has helped increase my income from referrals quite a bit. Read post.
my experiance is not good with google referrals, but i want to give a last try, if it workd. will read this article then will plan ahead. thanks for sharing
nice info, but indeed clicks are required for any conversion.. merging text ads / text referals with the links of your site (color and font size as u said) is best way to get higher CTR. thanks