SIG-NEWGRAD

HTML resources:

• Google Directory on HTML
• World Wide Web Consortium (W3C)
  (the definitive guide to all things HTML from its source)

LaTeX resources:

An astonishing number of LaTeX resources are available on the web, but since you will likely be using LaTeX to write most if not all your technical documents over the next few years, it might be worth your while to invest in a LaTeX reference book. 

• The Not So Short Introduction to LaTeX2e
  (available for free download; the above link is a local copy of the original that loads very slowly.)
• A Guide to LaTeX
• The LaTeX Companion and The LaTeX Graphics Companion
  (a two volume set that some folks recommend)
• LaTeX : A Documentation Preparation System
  (the original book on LaTeX written by the creator of LaTeX himself)

• Robert Miner's Learning LaTeX
• MIT's Inessential Guide to LaTeX
• Latex Project's Introduction to LaTeX
• Brown's Introduction to TeX, LaTeX, BibTeX and SliTeX

• Cambridge's Text Processing using LaTeX
• NASA's Hypertext Help with LaTeX
• NASA's list of other on-line resources
• TeX Users Group's TeX Resources on the Web
• AGU's quick reference to LaTeX Symbols

• Graham Williams's TeX Catalogue Online
• W3 Consortium's list of conversion tools

• Udo Schuermann's LaTeX-to-PDF How-To
• Duke ISDS's Generating "good" PDF files from LaTeX
• The DVIPDFM Homepage
• How to Use Postscript Files Properly
• Portable Postscript Tips

• LaTeX Tricks: BibTeX
  (a great little introduction to using BibTeX (and Emacs BibTeX mode); server seems to be down on occasion)
• Documentation for BibTeX mode in GNU Emacs
  (extremely comprehensive and utterly customizable)

• University of Karlsruhe's Collection of Computer Science Bibliographies
• LIDOS AI database

Emacs resources:

• GNU's extensive Emacs FAQ
• Chicago's Tutorial Introduction to Emacs

Unix resources:

• Edinburgh's Unix Help (mirrored at Mississippi)