Indent after section headings

LaTeX implements a style that doesn’t indent the first paragraph after a section heading. There are coherent reasons for this, but not everyone likes it. The indentfirst package suppresses the mechanism, so that the first paragraph is indented.

indentfirst.sty
Distributed as part of macros/latex/required/tools (or browse the directory)

This question on the Web: http://www.tex.ac.uk/cgi-bin/texfaq2html?label=secindent