Getting your website or blog ready for AdSense isn't always a picnic, and trying to peg the right keywords to generate the best ads for your audience can often prove to be a cryptic game of whack-a-mole. Sure, Google offers their own basic sandbox for building your ad units, but they don't really help you with either of the aforementioned tasks.

Thankfully, Amit Agarwal has stepped up to the plate and offered the Adsense Sandbox, a simple tool that allows you to quickly see 20 text ads, as well as Adlinks and Rich Text Ad results (images and videos) for a particular URL or keyword(s). As a particularly nice touch, Amit even included the ability to change your country to ensure the most accurate URL and keyword results for your neck of the woods.