Set itemize default settings in preamble [duplicate]

Question

If I want itemize always in this format

   \begin{itemize}
            \setlength{\parskip}{3pt}
            \setlength{\itemsep}{0pt plus 1pt}
            \item ...
    \end{itemize}

How could I do? How could I set up \setlength{\parskip}{3pt} and \setlength{\itemsep}{0pt plus 1pt} by default?

Answer 1

Based on this answer:

\documentclass[12pt]{article}
%------------------------------------
\let\tempone\itemize
\let\temptwo\enditemize
\renewenvironment{itemize}{
\tempone
\setlength{\itemsep}{0pt plus 1pt}
\setlength{\parskip}{3pt}
}
{\temptwo}
%------------------------------------
\begin{document}
\begin{itemize}
\item First item
\item Second item
\item Third item
\end{itemize}

\end{document}