Maybe mention done_testing as an option? I always start with use Test::More; ...; done_testing;, and then when I'm done with the first pass of writing tests, I switch over to use Test::More tests => N;.
Maybe give example of is, since it's a pretty common one?
You could perhaps also mention the t directory: it's fairly easy to create a t directory beneath the location of the script being tested, and then just run prove.