Affiliate Marketing Secrets

I just started my own online clothing business. I have cute and good quality items (usually things that are popular and in for teen/young adults). I have a website – www.materializeme.com (still working on getting all my items put on the site and a catalog section) – I sell on Ebay and have even tried selling on Craigslist (but buyers flake and are usually cheap). How can I get more customers without robbing my bank? What’s the secret to getting more clientele?
Also, I’m thinking about selling at Farmer’s Markets and Art Shows. Thoughts/suggestions/ideas are appreciated on this topic too 🙂
Thank you so much in advance!