If you want to design effective Web pages, remember users don’t read pages, they scan them because they’re usually in a hurry; they know they don’t need to read everything; they’ve been scanning newspapers, magazines, and books all their lives to find the parts they’re interested in, and they know that it works.
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.