FAIRsFAIR - Fostering FAIR Data Practices in Europe - was a project that ran between March 2019 and February 2022. It involved 22 partners from 8 EU member states with 6 core partners (DANS, CSC, DCC, TrustIT, STFC, EUA). The project was designed to supply practical solutions for the use of FAIR data principles throughout the research data lifecycle. The work on the project was guided by commitments to openness, FAIR-ness and long-term sustainability of project outputs. This report describes the sustainability planning for 21 project outputs deemed of particular importance, both to EOSC and to the global research community. These outputs were categorized using the Horizon 2020 categories of Key Exploitable Resource, Key Output and Key Function. These outputs were highly diverse and ranged from frameworks and written reports to practical FAIR tools and stakeholder networks.