LaTeX_tips.pdf contains a collection of best practices using LaTeX (with or without LyX). I have compiled them primarily for my reference, but I hope that you might find them helpful, too. Check out my post on tangents.blog for more information about the origin of this project.
The file configJCW.sty contains my recommended settings and can be added as a package to your TeX system. It is loaded in the LaTeX preamble with
\usepackage{configJCW}
The file configJCW.lyx contains the accompanying LyX macros needed to properly display things in LyX. Insert it at the beginning of your LyX document, as described in configJCW.lyx.