You might be reading the LaTeX wiki pdf too much when...
 

[CODE]\color{cyan}{\foreach \n in {a,b,c,d,e,f,g,h,i,j,k,l,m}{
\foreach \i in {a,b,c,d,e,f,g,h,i,j,k,l,m}{\!\!\rule[0pt]{\baselineskip}{0.5pt}
\begin{rotate}{90}\rule[15pt]{\baselineskip}{0.5pt}\end{rotate}}\\}
}[/CODE]

generated a grid for fun.

Nice!
Have you tried tikz already?

[CODE]\usepackage{tikz}[/CODE]

[QUOTE=Nick;504087]Nice!
Have you tried tikz already?

[CODE]\usepackage{tikz}[/CODE][/QUOTE]

yeah my example used tikz, mathtools, rotating, and xcolor, trying to add labeling is a pain though.

[CODE]\begin{tikzpicture}
\foreach \n in {1,2,3,4,5,6,7,8,9}{
\foreach \i in {1,2,3,4,5,6,7,8,9}{
\draw[cyan] (\n\baselineskip,\i+1\baselineskip)
--(\n\baselineskip,\i\baselineskip) node{\tiny(\n,\i)}
--(\n+1\baselineskip,\i\baselineskip);
}}
\end{tikzpicture}[/CODE]

only went up to 9 because even then theres overlap of node labeling. I'll Admit I looked it up in the manual.

[CODE]\count255=1
\loop
\foreach \n in {\section ,\subsection ,\Thm }
\n{};
\ifnum\count255 < 255
\advance\count255 by 1
\repeat [/CODE]

basically other than a proper list of each and a way to map it to the proper ordering of things all you need on top of autonumbering and a few cool packages.