Here are three Adsense Tips, together with the required HTML code, to dramatically increase CTRs and Google Adsense revenue.

1. Correct HTML Code to Include Images or Graphics Above An Adsense Leader Board Block:

Expert SEO Forums have been abuzz over a new Adsense tip which has seen a dramatic increase in CTR's.

Many webmasters have reported increases over 400 percent after adding four images, expertly positioned horizontally over a 4 block Adsense Leaderboard, with no border.

I don't see any reason why this would not work on smaller blocks, but you would have to alter the following HTML accordingly.

Here is the HTML code you should use to align the images directly over the ads -- please be cautioned, so as not to breach Google's TOS, you should not use any other text around these images, apart from the required Adsense code:

[table cellspacing="0" width="728" border="0" cellspadding="0"]
[tbody][tr]
[td width="182"][img src="X" /][/td]
[td width="182"][img src="X" /][/td]
[td width="182"][img src="X" /][/td]
[td width="182"][img src="X" /][/td]
[/tr]
[tr]
[td colspan="4"]
GOOGLE AD CODE HERE 728x90
[/td]
[/tr]
[/tbody]
[/table]

NOTE: Please do change all [ ] brackets above, to the required HTML brackets < >.

Here is one of the relevant threads at SEO forums that has a clear "graphic" example, with before and after pictures clearly depicting how to add these images:

Forums Digital Point - Quadrupled Adsense CTR's thread

A website with thousands of drawings of little Piggies, was responsible for starting the above thread!

2. Maximize Google Adsense CTRs using the Competitive Ad Filter to exclude low-paying Blog related URL's:

Have you ever had days where 50 clicks would pay you the grand total of $1.50 - well that's the combined power of 3 cent clicks or low-paying Blog related ads. working against you.

This post Maximise CTR with Adsense for Blogs at the Shaolin Tiger blog gives you a good list of around 50 URL's to include in the "Competive Filter" of a Google Adsense account:

This will naturally filter out the low-paying Ads which Blog software and related domains seem to serve up.

3. Adding a Double Block of Large Rectangle Adsense Blocks at the End of each Post or Webpage

A number of the high-trafficked blogs, add a double block of 336x380 "Large Rectangle" blocks at the very end of a Post or Webpage, just as the visitor is about to leave.

Makes sense - a visitor is about to leave, and has one of two choices:

(a) visit another page on the site, or

(b) click on a high "paying" Google Adsense ad, prior to leaving the site

Serving them with a wide-choice of Adsense ads in the format which is statistically proven to have the best CTR, is an obvious choice. Trialling this placement has made a dramatic improvement in CTRs for the Marketing Defined blog.

So go ahead, use these 3 Adsense Tips to make a dramatic increase in your CTR's.