You have something to submit to the archive - great! Before we even start, here's a check-list of things to sort out:
The name you choose should also (as far as possible) be somewhat descriptive of what your submission actually does; while "descriptiveness" is to some extent in the eye of the beholder, it's clear that names such as mypackage or jiffy aren't suitable.
If you are able to use anonymous ftp, get yourself a copy of the file README.uploads from any CTAN archive. The file tells you where to upload, what to upload, and how to notify the CTAN management about what you want doing with your upload.
You may also upload via the Web: each of the principle CTAN sites offers an upload page - choose from http://www.ctan.org/upload.html, http://www.dante.de/CTAN/upload.html or http://www.tex.ac.uk/upload.html; the pages lead you through the process, showing you the information you need to supply.
If you can use neither of these methods, ask advice of the CTAN management: if the worst comes to the worst, it may be possible to mail a contribution.
If it's appropriate (if your package is large, or regularly updated),
the CTAN management can arrange to mirror your
contribution direct into the archive. At present this may only be
done if your contribution is available via ftp
, and of course the
directory structure on your archive must 'fit'.
This question on the Web: http://www.tex.ac.uk/cgi-bin/texfaq2html?label=uploads