Avoiding naming collisions in TeX/LaTeX

Both the pifont and marvosym package define a macro named cross, so a simple \usepackage pair like:

\usepackage{pifont}
\usepackage{marvosym}

generates an error. The savesym package is here to save the day:

\usepackage{savesym}
\usepackage{pifont}
\savesymbol{cross}
\usepackage{marvosym}
\restoresymbol{PIF}{cross}

Now both packages are loaded safely (and the pifont \cross macro is now available under the name \PIFcross).