A simple demo with everything in place to publish to Launchpad.
sudo apt-get install devscripts # dependencies
tar -acf hello-ppa-world_0.2.orig.tar.gz hello-ppa-world
cd hello-ppa-world
debuild -S -sa
cd ..
dput ppa:tomlankhorst/ppa hello-ppa-world_0.2-0ppa0_source.changes