[bongodongobob]

Honestly the way I learned not to use a ton of global variables was because I used so many and would forget what they'd do. But that was back in the days of Apple // BASIC so when I was introduced to C I rejoiced. People need to learn from mistakes.

[nomel]

For me, I learned when I wanted all my function calls to do the same thing no matter how many times, or order, I called them.

I often wonder how much "pain" is required to really learn something. I would claim that 90% of how I write code is the result of pain, not patterns, even though they often end up being similar.