For the extreemly lazy

You could use a HERE statement.

$html = <<HERE;
THIS IS THE HTML STUFFZ
HERE
print $html;
[download]

I would not recomend doing this for pages you plan to update frequently or if you endup with more lines of html than of perl in that program.
If you are thinking about the HERE statement route I would suggest reading the html in from a file, that way the perl is clearer and cleaner.