latex ENUMERATE that takes up less space

packed_enum.tex

% This is a drop-in replacement for \begin{enumerate}...\end{enumerate} in LaTeX.  Just include it in
% your preamble and use \begin{packed_enum} instead.
\newenvironment{packed_enum}{
\begin{enumerate}
  \setlength{\itemsep}{2.5pt}
  \setlength{\parskip}{0pt}
  \setlength{\parsep}{0pt}
}{\end{enumerate}}