I started to use (La)TeX around 2004 when I began my university studies. Since then I've been trying to learn more and more about this wonderful typesetting system and this process will hopefully not stop before the worms start feasting on my corpse.
These days I teach mathematics, physics, and geography in high school, and typeset all my work-related notes using LaTeX.
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Q&A for users of Mathematica
Q&A for people studying math at any level and professionals in related fields
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Q&A for peer programmer code reviews