\documentclass{article}
\begin{document}
\section*{Intro}
This is all about me. {\Large Me-me-me}. \textit{Me}. \textbf{me}. {\small mini-me}.
\section{How I spent last summer}
\subsection{June}
Exams, examiantions, more exams, examinations.\\
Then more exams. (Note: new paragraph.)
\subsection{July}
Hot or not.
\section{How summer ended}
It becames less hot.
\end{document}