 Making your research data available for secondary use has great potential to unlock the outputs of your research for use beyond the scope of the original trial. Planning for sharing and reusing your data starts at the very beginning of your clinical trial journey. Here are some things to consider. Find out the data sharing requirements of your funding body. In the study protocol, outline what data you plan to share and how it will be made available. Make sure your participant information and consent form includes consent for reuse of data. Acknowledge and incorporate data sharing requirements in your data management plan, ethics application and any third-party agreements. In your trial registry, such as ANZ-CTR, mark your trial as available for data sharing. Implementing these considerations when setting up your trial for data sharing will maximize benefits for participants, yourself and your research organization. Health Data Australia is a national health data catalog that facilitates data sharing for secondary research purposes. You can choose to include your trial in Health Data Australia from the beginning and decide when data sets can be shared. To find out why you should share your research data and how we can help, visit our website.