How to have my artworks on t-shirts, bags and more?

I'm a young artist and would like to sell my artworks on products such as clothing, bags, iphone cases and more.
How can I have my artwork on these items? Do artists have comepanies to help make them or do they use a customize online one?

Zazzle.com and CafePress are two places that do it. There are many others.

I have my company logo in a couple of my jackets. Save them on to jpg.file.
1. Embroidery (done @ the mall or someone you know locally who owns an embroidery machine.
2. You can have a friend, a neighbor do them, if they are professional artist. Painters have done my jacket, I'm waiting for them right now. I will then add my own embellishments.
3. Find artist on Craigslist in your city. There's one I will recommend, but they're locally in Portland, OR