That's exactly how I started as well: documenting a project I was doing so the information I gathered was in one place. Just yesterday, I was writing a Makefile

That's exactly how I started as well: documenting a project I was doing so the information I gathered was in one place. Just yesterday, I was writing a Makefile, and I referenced my own blog post on the topic to refresh my memory. It really helps to have your own personal knowledge store, and writing in a way that can be published publicly helps me write clearly. Future me benefits and so do readers who I never expected would stumble onto on my writing.