Very few people will avoid a site just because they see the same explanation of what it is every time they go there - unless it takes up half the page. Think about it: Even if you know what JAMA is, will you be offended by seeing “Journal of the American Medical Association” next to the logo in small print?
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.