\documentclass[12pt]{article}
\begin{document}

\section{First section}

  \begin{table}[!ht]
    \centering
    \begin{tabular}{|r|l|}
      \hline
      row1col1 & row1col2\\
      \hline
      row2col1 & row2col2\\
      \hline
    \end{tabular}
    \caption{A table caption}
    \label{tab_the_table}
  \end{table}

  \subsection{First sub-section}
  \emph{Hello} \texttt{World} to \LaTeX.\\
  Look up the table \ref{tab_the_table}!
  \begin{itemize}
    \item one
    \item two
    \item three
  \end{itemize}

  \subsection{Second sub-section}
  % Believe in Einstein.
  $E = m \cdot c^2$... for real.

\end{document}