How to prepare autoupdating PPA?
Is there a proper method that works to create a daily automatic build of a PPA in Launchpad? If so, what is the proper methodology?
The best way is through Launchpad recipes. The main documentation for recipes is at https://help.launchpad.net/Packaging/SourceBuilds/Recipes.
Matt Revell also posted a nice introduction youtube video when recipes were first announced that I would recommend watching: http://blog.launchpad.net/cool-new-stuff/source-package-recipes