I'm not really convinced VistaPrint is the best example to learn from. Allegedly, they do some pretty shady things with their customer data[1][2]. Something about signing people up for some useless service with recurring monthly fees without their explicit consent.
I guess that's one way to compensate for not getting outside investment, but it seems pretty shortsighted to me. It certainly was enough to scare me off when I was ordering business cards a little while back...
[1] http://www.etsy.com/forums_thread.php?thread_id=5174090 [2] http://www.consumeraffairs.com/online/vistaprint.html