Package-Building-Howto?

Hi there, I'm using Debian for over three months now and I'm quite satisfied with it. :-) But as I could not find GNOME .debs, I figured out it would be great to build them myself. So, I digged through several dpkg-*-man Pages, read /usr/doc/dpkg/packaging.html/almost-* and after all failed to

Re: Package-Building-Howto?

So, is there anything like a Debian-Packaging-Howto which explains the internal structure of .debs and how to build packages oneself? In /usr/doc/dpkg/packaging.html/* there is nicely explained, what everything does, but it's not clear, HOW to do things...