RPMing Python
I was fighting with packaging some software at work, trying to produce a workable RPM package to replace the manually installed kludge currently polluting one of our servers, and discovered the --spec-only option to the bdist_rpm action.
Now, this particular option only makes sense since a spec file must be generated for bdist_rpm to work anyway, but I never thought about it. What it provides is an awesome shortcut to doing packaging slightly more complicated than merely relying on what bdist_rpm produces. Why? Because of the sdist action.