I've been spending a lot of time messing around with adsense, and a few things I found to work very nice.
1. Borderless ads get way more clicks.
2. Integrated ads get more clicks. Simple things like matching the page link style to the Adsense link style increases CTR dramatically.
3. More ad placements. I used to think that one ad unit would do. Either the user is going to click on the ads or they aren't. Boy was that wrong! Clicks doubled when I went from one Adsense unit to two. They increased again when we went from two units to three.
4. Higher on the page, even if it means moving the content down.
If you guys got any tips, post 'em
