The Mindful Scenario Task Analysis (MSTA) Toolkit is one of the tools developed as part of the design phase of the MinD project. People with dementia can encounter difficulties in ordinary situations. It is not always easy to recognise these difficulties or find solutions for them. MSTA can help everyone involved in the co-design process to analyse and think through situations and scenarios and establish what might be done. This booklet provides a brief introduction to MSTA as well as a step-by-step guide of how to do MSTA including some useful examples and case studies.