1) Select product
Ready to create? First choose a shirt, any shirt. Then click. We'll ask you the color you'd like, and off you go.
2) Get started in Designer.
With our handy Online Design Tool, you can create almost anything you envision. Sky's the limit! Type a message in the text box, then choose from font selections to make it your very own. Even add a graphic or photo. You can design one side only, or both front and back.
Our Online Design Tool makes the whole process quick and easy. But–if at any time you need help, a real-live expert is just a click away (in that little green box on the left of the screen). Help is available Mon.-Fri. from 6am to 9pm Eastern Time, free of charge. And, if you like, you can even ask us to view your design and provide technical assistance to help you achieve exactly the look you are striving for...at any point in the process.
Source : http://www.cafepress.com/make/custom-t-shirts