Another step I find useful "Before uploading" is to use pod2cpanhtml
to get a glimpse of what my POD will look like on CPAN. It is as close as you're going to get to the real thing.
Update: I noticed this useful piece of information on CPAN Ratings: "It is also possible to preview CPAN HTML using http://search.cpan.org/pod2html service, that allows uploading .pm files."
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Want more info? How to link
or How to display code and escape characters
are good places to start.