I'm an avid user of Lyx, a GUI front-end for Latex. I wrote my entire 200-odd page dissertation in Lyx, except that at the end I exported the individual chapter files to Latex and assembed as a single document using straight Latex. Lyx displays in a more-or-less WYSIWYG format but based on the Latex engine. You can convert back and forth from Latex documents (well, ok, the Latex to Lyx direction is more tricky) and embed raw Latex within the document for the tricky stuff that Lyx can't do natively. I love being able to see the equations as you type them - you type in standard Latex math syntax and Lyx interprets on the fly; it's like having a direct brain-to-typed-equation converter.
To create a ps file, you just export your Lyx file to Latex and compile as usual. To create a pdf file you can directly export as pdf (Lyx uses pdflatex to do the conversion) or you can export as a Latex file and use pdflatex, or you can export as Latex and go the ps2pdf route.
Note that I've had trouble with the default Latex to html converter in Lyx, tth, and prefer to export my Lyx file to Latex and then use latex2html.
Occasionally, I have the problem that when I try to start Lyx, it gives me a segmentation fault; this is usually solved by deleting the directory $HOME/.Lyx and logging out and back in.
A few random tips:
Last modified 11/19/05.