\documentclass{article}
\title{List test}
\date{}
\footerfalse
\newenvironment{list2}
{\begin{list}{}{\setlength{\itemsep}{0em}\setlength{\labelsep}{0em}%
      \renewcommand{\makelabel}[1]{\textbf{$\bullet$\ ##1}}}}
{\end{list}}%
\begin{document}\maketitle
\section{Paragraphs}
Long text,
long text,
long text,
long text,
long text,
long text,
long text,
long text,
long text,
long text,
long text,
long text,
long text.

Long text,
long text,
long text,
long text,
long text,
long text,
long text,
long text,
long text,
long text,
long text,
long text,
long text.

\section{Simple lists}Environment \texttt{itemize}
\begin{itemize}
\item First item.
\item Second item.
\end{itemize}

Environment \texttt{enumerate}
\begin{enumerate}
\item First item.
\item Second item.
\end{enumerate}

Environment \texttt{description}
\begin{description}
\item[First] item.
\item[Second] item.
\item[Third] long item, long item, long item, long item, long item, long item, long item, long item, long item.
\end{description}

\section{Complex list}
\begin{list2}
\item Coucou
\item Zobi
\begin{list2}
\item[a] Coucou
\item[b] Zobi
\end{list2}
\end{list2}

\end{document}
