bang two rocks together
use a little CGI, lots of raw HTML
use CGI and templates
use a framework (Catalyst, CGI::Application, etc)
am entangled at a quantum level with Perl, Apache, HTML, CSS and JS
Results (397 votes), past polls
By rote learning.
Via Genetic memory.
It's provided by my firmware.
I just remember them.
Thirty days hath September
My computer gets it right, usually.
I just ask someone else.
Someone punches me on the first of the month.
Results (160 votes),