Some link to handy documentation about TeX and LaTeX
General tutorials
The famous Not so short intro to LaTeX
Formatting: a beginner introduction to typesetting with LaTeX
A gentle introduction to TeX
Comprehensive list of symbols
LaTeX wikibook
The Beauty of LaTeX
Documentation directories
The full CTAN documentation directory
TeX Live documentation
Specific Packages
Beamer user guide
Official A0 Poster documentation
and a
nicer one
Fonts
Using a Truetype font in Pdflatex:
script
Font installation guide
Font Catalogue
Other Tutorials
Getting to grips with LaTeX
Getting Started with LaTeX