Debian packaging

Template:Workshop We could work on a synthetic example, but it would be best we worked on something that you actually want to package (and maintain?) for Debian. So if any of your favourite programs (whether you wrote them or not) is not packaged, let's take them as working example. Anybody has such a program (or dataset or ...) to suggest?

Take a machine running Debian with you, with everything needed to compile the program installed and the following packages: build-essential, devscripts, dpkg-dev (plus a reasonable selection of their recommendations and suggestions).