Serious question: Is LaTeX used outside academia these days?
I'm finishing up a 350+ page family history book that I wrote in LaTeX; I've got two or three more to go, and I wouldn't consider using anything else. It's got its quirks, but it was so easy to work with page formatting, footnotes/endnotes, and sections that it made up for all the fiddly issues I ran into with images. I have also been using the genealogytree[0] package (which relies on TikZ, coincidentally used by OP…
For longer documents in TeX, I wrote a collection of TeX macros for to make cross referencing easy. The collection was a little tricky to write but is fairly easy to use and works great. The package is based on some logical names that serve as, say, pointers; then in one place define such a name and in other places refer to it and get the page number, etc. inserted where the reference is made. Given some simple examples, it's really easy to use. I have a simple macro for my favorite text editor that will create a new, the next according to one scheme, such logical name. Having an easy way to have cross references is nice.
I also have something similar but simpler for bibliographic references.
TeX, some TeX macros, a good text editor with a good macro language (e.g., KEdit), and a good spell checker (e.g., ASpell with the last TeX distribution I got) are super good writing tools to have.