I prepare my checklist including questions and related ISO 14001 clauses. Sometimes I use tables to help me record useful and mandatory information
When performing an audit, I use different pen colors for each audit day, and I use a set of symbols to make easier to search among the written text. A symbol for positive things, a symbol for what seems to be an opportunity for improvement, and a symbol for I think are nonconformities.
When starting to prepare the report I rapidly read the completed checklist and underline with different colored markers the conformities, non-conformities and opportunities for improvement. Then, I read again all topics from each color in search of any pattern that could be useful for the report.