LaTeX.org

I'm returning to theoretical physics after an absence of many years. Back then original creative work was most often done with pencil and paper, then transcribed with the crude computer tools available at the time for distribution & publication. I'm wondering if LaTex and LaTex editors are now ...

I'm going to be getting into some new work in theoretical physics that I know will require LaTex at some point, so this seems like a good place to pick up some tips and advice. I've done a lot of work in programming but this will be my first brush with LaTex in depth.