Footnotes

% repeat the same footnote multiple times
one\footnotemark[\arabic{footnote}]
two\footnotemark[\arabic{footnote}]
\footnotetext{Whatever}

% another way of doing the same thing, which creates different-numbered footnotes if there's a page break
\usepackage{fixfoot}
\DeclareFixedFootnote{\whatever}{Whatever.}
one\whatever
two\whatever

% Make footnotes one-per-page
\usepackage{perpage} 
\MakePerPage{footnote}

% number footnotes with symbols
\makeatletter
\def\@makefnmark{\@textsuperscript{\normalfont\fnsymbol{footnote}}}%
\makeatother