The first thing you do is create a new directory, set it up as a git repository, and copy in an SConstruct file from a template example so you can use scons to handle the .tex->.pdf conversion for you. You commit the near-empty files.
Once you have done so, you laugh to yourself when you realize how forgetful you are, add an empty "TODO" file, and commit again.
Also, if you understand everything in this post.
(Sucker.)
