When coding on my own, I use: - TDD - Version control systems (GIT) - Issues to describe new features & bugs - git branches - Pull requests with code reviews (I create something based on an issue I created and review the code later, pref. a day or 2 later)

It seems tedious and slow at first, but it really isn't in the long run. It results in clean, organised flow of code & projects.

At work, I used RCS, because it was the lowest-maintenance solution I knew of at the time.

After leaving that company, I eventually discovered mercurial, and later fossil.