There is a simple HTML code used in Wordpress blogs to position adsense ads and some adsense alternatives, with no plug-in required. The code allows positioning of click advertisements into the post so that the text will wrap. This not only makes the page look better, it can also increase CTR (Click Through Rates). I like that there is no plug-in required to place the click ads or affiliate program html. The ads can also be set to appear on the left or right with the text wrapping nicely.