%your own macros, abbreviations, etc.

\newcommand\todo[1]{\textcolor{red}{TODO: #1}}
\newcommand\fixme[1]{\textcolor{green}{FIXME: #1}}

\newcommand\ie{\textit{i.e.}\xspace}
\newcommand\eg{\textit{e.g.}\xspace}
\newcommand\etal{\textit{et al.}\xspace}