Here are some quickest tips to increase your Adsense earnings by improving your CTR

Place your ads so that they can not be differed from content. Embed your ads with same colors and links as in your blogs.

Put ads at the Start and end of posts. Also placing Ads between the post text and in the sidebar is preferred.

Ads should not be placed such that site will look bulky and unimpressive, it can reduce your click through rate.

Keep your ads unnoticeable to increase the CTR.

Embed the picture ads to attract the sights of the visitors.

Place link unit ads at the header and footer of the blog.

Use adsense re