Have you noticed that many sites where adsense is implemented wrap their text around Google Adsense advertisements? It catches the reader's attention across your ads while reading the article, which is a good way to generate a better click-thru rate(CTR), more ctr means more money. This is made possible by using the div tags to float the ads. Below is the code to achieve the same for a 250 pixel wide ad:
<div style="float:left;width: 250px">Google AdSense Code</div>
Tips and Tricks to Increase Adsense CTR and making money with Google AdSense