Where to paste the AdSense codes?

Update: This is an old post but is still applicable to those using the old classic Blogger template. Those using the New xml Blogger template should use the HTML/Javascript gadget (Page Element)Where to paste the AdSense codes? This will depend on where you want the ads on your site. Probably the most prominent place to place it will be just below the header, like on this site. If so:1. log into