You should only have one document environment per document. I'd to something like 
% \include{preamble}

\begin{document}

% \include{header}

{The Superintendent of Elections \\
for [% County_Name %] County Georgia \\
[% County_Addr1 %] \\
[% County_Addr2 %] \\
[% County_city_st_zip %]} \\

...

[download]
where the preamble is 
\documentclass{article}
\usepackage{fancyhdr}
\usepackage[letterpaper]{geometry}
\usepackage[pdftex]{graphicx}
\pagestyle{fancy}
\addtolength{\headheight}{0.25in}

[download]
and the header is 
\fancyheadoffset[L]{10pt}
\fancyhead[L]{\includegraphics{ggp_logo_100px}}%

\begin{minipage}[t]{5in}
\setlength\oddsidemargin{2in}
\begin{center}
\Large\textbf{The Georgia Green Party} \\
\normalsize
{P.O. Box 450012; Atlanta GA 31145 \\
404-574-3471 * ggp@greens.org \\
\underline{http://www.greens.org/georgia/}}

\bigskip

\small\emph{Ecological Wisdom * Grassroots Democracy * Social Justice 
+* Pea
+ce and Nonviolence \\
Decentralisation * Community-Based Economics * Feminism * Respect for 
+Diver
+sity \\
Personal and Global Responsibility * Future Focus on Sustainability }
\end{center}
\end{minipage}

[download]
For (1) and (3), The Latex Companion is an invaluable book for finding the tricks needed to force your will upon LaTeX.

-Mark

In reply to Re: OFF-TOPIC: Seeking LaTeX advice, please by kvale
in thread OFF-TOPIC: Seeking LaTeX advice, please by hesco

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