This report results from the experience and lessons learned in co-designing the thirteenCos4Cloud services. The technological services were created from a bottom-up approach,following a co-design process connected to an agile software development methodology.The co-design team implemented the co-design process as a service within the Cos4Cloudconsortium, as stated in task 5.2. The result of implementing the co-design framework andmethodologies and the corresponding monitoring during the co-design of the services,were evaluated and adapted to be shared with the citizen science community as amethodological guide. The guide was designed in a visual friendly format and published inZenodo to promote its use by the public. The document it’s available at:https://doi.org/10.5281/zenodo.7472450 The present deliverable includes an introduction to the world of co-design, where the maindefinitions and mindsets of co-design and design thinking are given, as well as some toolsto start applying the creative methodologies within them. Secondly, it introduces theco-design methodology followed in Cos4Cloud, together with some important concepts,such as citizen science and citizen observatories. Then, a practical guide of implementationis given, including all the co-design methodologies used in Cos4Cloud. The most standardmethods include a description and a work map template, while the customised onesincorporate a step-by-step guide to implement them. Finally, an explanation is given onhow the co-design process was implemented in Cos4Cloud as a service for softwaredevelopers, by using three interactive platforms that allowed us to perform all creativesessions, including the co-design team and community that supported the process. Thedocument concludes with an invitation to implement co-design processes in other softwaredevelopment projects.