If you do not know already, it is always a good practice to version control your code. A version control system (VCS) brings in the following benefits:
You can go back in time and check any code
Allow multiple developers to work on the same code base and manage conflicts
Document changes to specific code releases/commits
Easier management of production code updates.
There are many VCS available. I personally recommend using Git.
You can read more about Git at http://git-scm.com/documentation.
Following is a quick summary on the basics of Git:
Initializing
Once you have created a Catalyst application or any folder that you want to version control, you need to first initialize it as a Git repository. This can be done with git init.
Adding files
After you initialize a repository, you have to add the files that you want to version control. This is called adding files to the repository. You can add files using git add. Generally, it is standard practice to use git add to add all files to...