Descriptive file names are an important part of organizing, sharing, and keeping track of data files. Develop a naming convention based on elements that are important to the project.
Heirarchical file structures can add additional organization to your files. As with file naming use whatever makes most sense for your data. Some possiblities include:
For more on file structure, versioning, and a bonus preview of metadata and documentation, watch the Software Carpentry video on Data management