The paper presents best practices and results from projects in four countries dedicated to thecreation of corpora of computer-mediated communication and social media interactions (CMC).Even though there are still many open issues related to building and annotating corpora of that type, there already exists a range of accessible solutions which have been tested in projects and which may serve as a starting point for a more precise discussion of how future standards for CMC corpora may (and should) be shaped like.