[header] How to start a t shirt business [title] Identify your target market. [step] Since the t-shirt market is already so developed, your own business won't survive long if you try to compete with every other t-shirt business. Instead, focus on one target market or niche. 
[substeps] Make your target market specific without becoming too obscure. For example, " funny graphic shirts " would be a bad market since it's too broad.