This how to is under development but it might help. Feel free to contribute.
ChangeLog, NEWS.README, AUTHORS, THANKS, TODO (when present).configure.in.in or configure.ac.in which name you've chosen.svn from package_version_tag../autogen.sh.make distcheckINSTALL, COPYINGsvn copy https://svn.xfce.org/svn/goodies/package/trunk \
https://svn.xfce.org/svn/goodies/package/tags/<package-version>
configure.in.in or configure.ac.in.package_version_major, package_version_minor and package_version_micro version to the new release.svn to package_version_tag.