How to market a zazzle store?

[WeirdB-MovieCollector]

I've got a friend who wants to start a Zazzle store of his artwork on t-shirts and stuff but he wants to make sure that he's going to make money off of it so we're trying to figure out how do you market your Zazzle store. How do you get web traffic and stuff like that? My friend has dozens of designs he's planning and he's really good at graphic design. Plus neither I or him have money to pay a marketing company to help out. Anyway, we need some marketing help.