This document is a guide that outlines best practices for designing effective survey questionnaires. It emphasizes the importance of creating surveys that are engaging and intuitive to retain respondents' attention. Key recommendations include keeping the survey length to around 15 minutes, ensuring a logical flow from broad to specific questions, and maintaining simplicity and neutrality in wording. The guide details various elements to consider, such as the use of screener questions to determine the target group without revealing the survey topic. It also advises against using jargon, ambiguous language, and double-barreled questions. Additionally, the document discusses the importance of incorporating quality checks, such as red herring questions, to ensure respondent engagement and data quality. By following these guidelines, survey designers can create questionnaires that effectively gather relevant information while minimizing distractions and biases.