Five Hints for Modern LaTeX

  1. Install the cm-super package and put \usepackage{etex,microtype} in your preamble.

  2. Enable clickable links with \usepackage{hyperref} and use \autoref{thm:foo}.

  3. Write \emph{this}, not {\em this}. Similarly, use \textbf{this}, not {\bf this}.

  4. For displayed formulas, use \[ ... \], not $$ ... $$.

  5. Use chktex, ideally integrated into your editor.

And for a lot more, see