This book begins with a brief description of the essential, but often overlooked, checklist method. Checklists are used for many things in user-centered design (UCD), such as verifying that we are prepared for a usability test, that we have asked the critical questions during field interviews, and that we have followed best practices in the design of questionnaires. Chapter 1 provides some basic principles and practical tips for creating good checklists for UCD activities. Chapter 2 can be viewed as a checklist for questionnaire and survey designers. At the end of the book, an appendix provides information on some well-known usability questionnaires that might be useful for readers of this book.