Ensure your data is in a simple, standard format or formats which is machine and human-readable.
Check, reformat or create metadata to clearly describe what the data is, how it was collected, and any associated strengths/weaknesses to someone that finds it.
Identify a relevant, easily discoverable repository or repositories to host your data, and upload it there.
Assign your data a persistent identifier such as a DOI.
Include a licence granting others the right to use, copy and modify your work. You can use the Licensing chapter to help you pick the most appropriate licence for your project.
Include a README file containing useful information about a project such as what it is, how to use/install it and how to run any tests.
If you want others to collaborate on the project include contribution guidelines.
Make detailed documentation and designs for any hardware you develop openly available.
Include a licence granting others the right to use, copy and modify your work. You can use this website to help you pick the most appropriate licence for your project.
Include a README file containing useful information about a project (for example, what it is and the materials used).