If the site is very complex or novel, a prominent “New to this site?” link on the Home page is a good idea. But it’s no substitute for spelling out the picture in sight since most people won’t click on it until they’ve already tried and failed. And by then, they may already be hopelessly confused.
Don’t make me think
Being an expert in online usability Krug gathered his experience in a wonderful book. This summary of key thoughts will help you to remember most important principles and laws.