13) In LaTeX, how do I get a double-spaced document?

    One way is to change the value of \baselinestretch to 2 or 1.5 with
    the command \renewcommand{\baselinestretch}{2}. A better way is to 
    use the doublespace style file doublespace.sty in ./pub/tex/latex-style 
    from sun.soe.clarkson.edu (see question 22), or, if you are using
    the new font selection scheme, get the doublespace.sty from
    ymir.claremont.edu (134.173.4.23) in 
    [anonymous.tex.inputs.latex-contrib]. There's a setspace.sty from
    fileserv@shsu.edu (see question 22) which is more flexible, and
    consistent with the latest release of LaTeX.

    Incidentally, the reason you do not change the value of \baselineskip
    is \baselineskip has its value reset at any size changing command.