\documentclass{article}      % Specifies the document class
                             % The preamble begins here.
\title{TITLE}
% Declares the document's title.
\author{C'est Moi!}      % Declares the author's name.
\date{\today}      % Deleting this command produces today's date.
\setlength{\parskip}{6pt}
\newenvironment{ul}{\begin{itemize}\setlength{\parskip}{0pt} }{\end{itemize}}
\newenvironment{ol}{\begin{enumerate}\setlength{\parskip}{0pt}}{\end{enumerate}}
                             % The preamble ends here.
\begin{document}
You just landed on my New York Ave. hotel.
\begin{enumerate}
\item Begin by mortgaging all of your deeds.
\item Now pay my hotel rent.
\item Cough up or conk out!
\end{enumerate}
$$ e^{i\pi} = -1$$
\end{document}