\documentclass[12pt]{article}
\usepackage[T1]{fontenc}
\usepackage{lmodern}

\begin{document}

\title{Your title here}
\author{Your name here}
\date{}
\maketitle

\begin{abstract}
Your abstract text here
\end{abstract}

\section{Your section title}
\subsection{Your subsection title}
Your document text here

\end{document}