One more key is to:
1. Search you site or a page on your site you are looking to optimize on Google.
2. Click the "Cached" link under your listing.
3. Then click the "Tex-only version" link at the top right.
You can easily see, again what Google sees, all your links and more importantly your image alt tags and/ or image names. You may be surprised at what Google sees. Keep in mind that to keep your site keyword rich/ targeted you should take all your non-important images, like background images & buy it now images, and name them using numbers i.e. 132.jpg. This tells Google that this image is not important.
If you were to name it "buy-it-now.jpg" Google may think that your site is related to the keyword "buy it now". This also keeps thieves from searching for, and stealing your images/ graphics. Conversely if it is an image related to your product/ niche, like a product image, then name it something like "split-testing-plugin.jpg" and give it an alt image tag of one of your keywords. This alt image tag will show be the anchor text if that image is a link.