(La)TeX Tutorials, etc.

Some very fine tutorials have been written, over the years. Michael Doob's splendid 'Gentle Introduction' to Plain TeX has been stable for a very long time.

More dynamic is Tobias Oetiker's '(Not so) Short Introduction to LaTeX2e', which is regularly updated, as people suggest better ways of explaining things, etc. The introduction has been translated into several languages other than its original English.

A recent entrant is Harvey Greenberg's 'Simplified Introduction to LaTeX'; this was written for a lecture course, and is available on CTAN (in PostScript only, unfortunately).

Reference material is somewhat more difficult to come by. A sterling example is set by David Bausum's list of TeX primitives.

Gentle Introduction
info/gentle/gentle.pdf
Not so Short Introduction
info/lshort/english/lshort.pdf
Simplified LaTeX
info/simplified-latex/latex.ps