[Glide]

My personal experience is that I had to maintain a set of applications I wrote for a company. The same application had to be used repeatedly (3-5 times) a year because it supported a specific business processes. It was mundane work, but did it teach me how to organize because it made the pain of disorganized code very real. That one hack comes back to haunt you several times a year.

I was lucky that this was one of the first things I had learned as a developer out of school. It was a little different because the projects were small enough to be solo, but it was humbling because all of the mistakes were my own.