Spider Trainers provides gap services to marketing departments. We're big on testing, too, and we've learned a few things along the way. We've captured learned lessons in eBooks and white papers; the most-recent of which you can access for free.
You need these resources if:
Using triggered email to put you in the right place at the right time.
Using print to bolster a multi-touch marketing campaign.
How admitting "I don't know," will make you a better marketer.
Using web pages to improve marketing conversion rates.