Testing one user early in the project is better than testing 50 near the end. If you make it into a big deal, you won’t do it early enough or often enough to get the most out of it. A simple test early - while you still have time to use what you learn from it - is always more valuable than a sophisticated test later.

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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.

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