Do you maintain a website and you know where exactly you places the Donate button, Register now button and even Google AdSense ads. These are couple of things you would love when your visitors click on them. Don't you? Then find out whether your visitors notice what you want them to notice.
Google has come up with a simple webpage to show what and how others are viewing your website. If you get considerable number of visitors and still they do not do what you want them to do then you better test your website using Google Browser Size.
I am sure now you need to do some changes to your layout. I will leave it to you and share how you improve your website.
Official Google Blog: Browser Size: a tool to see how others view your website