Select a company online to do your print-on-demand T-shirts for you based on price, quality and reputation and any other factors that are important to you. Search online for reviews about the companies in which you are interested to see what other consumers have to say about them. Check out printmojo.com, greatapparelforyou.com, or islandimagedesign.com.
Ask for a sample before you order any large quantity to make sure they do quality work.
Take your own photos, make your own designs or buy images from a royalty-free stock photo company such as BigStockPhoto.com.
Decide on the wording, color of the letters and the font you want on your T-shirt.
Upload all images to the print-on-demand T-shirt website and fill in the words and colors you have selected.
Place your order, and pay online via Paypal, credit card or other method. Enter your shipping information.