Test the shit out of your action-area.
If it's a button, use different colors, flash, arrows... try anything you can imagine. From simple to really cool -- you never know.
Try creating the action early... try building up to it... try putting the action all over the page.
Often the best performer will surprise you. I always to try to predict it... I'm never right.
=====================
Cut through the BS. People can smell BS -- get it off your page. Adjectives are BS, try getting concrete figures for the topic.
================
good post/thread!