The easiest way to share your data is to place it in a repository -- that way, you won't have to deal with:
|Adding a license to your data.
||A repository will either prompt you to choose a license during data upload, or have a standard license for every dataset in the repository.
|Establishing access permissions for your dataset.
||A repository will have a standard set of access permissions for all files (or subsets of files) in the repository.
|Emails requesting data.
||Putting data in a repository means that data requests won't contribute to your email overload.
|Preserving and migrating your files to ensure ongoing access.
||As Jeff Rothenburg said, "digital information lasts forever—or five years, whichever comes first" (quote is from page 2 of his Ensuring the Longevity of Digital Information paper).