Hi
I've found a link, but I can't describe all the process for you here; the reason is explained in first few lines of where I've found a little tutorial:
This article wants to be an introduction to creating .deb packages, meaning I will not get into more advanced procedures like creating a menu entry, custom configuration, explaining the rules file and so on because this how-to would have ~20 pages or so.
check out Webupd8 for a small article about this. also it has several links for a detailed & complete discussion, like this article that seems to be the official one.
Good luck ;-)