My code is usually littered with stuff like
print "Foo: ".Dumper(\$foo) if $debug>7;
Often I write those in not knowing if I'll ever want
that level of verbosity; usually I never have to crank
$debug higher than 2 or 3. (1 just prints progress
info usually, depending on what the app is; 2 gives
more detail, and so on. 0 only prints actual errors,
and undef suppresses non-fatal errors. Anything past
5 is dumping lots of big data structures.) Occasionally
I do end up cranking it way up, though, and adding
in extra print statements like the above, that I
didn't originally anticipate needing.
